Infection risk assessment system, infection risk assessment method, and program

Abstract

The present disclosure addresses the problem of improving the accuracy of an infection risk evaluation. The infection risk evaluation system (1) comprises a position information acquisition unit (10), a sound information acquisition unit (11), an infected person information acquisition unit (12), a determination unit (13), a storage unit (14), and an evaluation unit (15). The position information acquisition unit (10) acquires position information for each of a plurality of subjects. The sound information acquisition unit (11) acquires sound information produced by each of the plurality of subjects. The infected person information acquisition unit (12) acquires infected person information for identifying a subject who is infected with an infectious disease. The determination unit (13) determines whether there has been close contact between the plurality of subjects at an arbitrary time and an arbitrary location on the basis of the position information. The storage unit (14) stores determination results from the determination unit (13) that indicate whether there has been close contact. The evaluation unit (15) evaluates the infection risk of each of the plurality of subjects on the basis of the determination results stored in the storage unit (14), the sound information, and the infected person information.

Description

[Technical field]

[0001] The present disclosure relates to an infection risk assessment system, an infection risk assessment method, and a program, and more particularly to an infection risk assessment system, an infection risk assessment method, and a program for assessing the risk of infection of an infectious disease. [Background technology]

[0002] As a conventional example, the information processing system described in Patent Document 1 is exemplified. The information processing system described in Patent Document 1 has a management server. The management server manages the history of which mobile terminals have been detected by a search function of Bluetooth (registered trademark) communication of the mobile terminal carried by each user. When it is found that a user of a certain mobile terminal is infected with an infectious disease such as a new strain of influenza, the management server identifies users who have been nearby, i.e., who may be infected with the same infectious disease, based on the history of the search results by the user's mobile terminal. The management server notifies the mobile terminal of the identified user that the user may be infected with the infectious disease.

[0003] Incidentally, the risk of an infectious virus being transmitted from person to person varies depending on factors such as the distance between the two people and the amount of time they are in contact, whether or not they are talking to each other, and the direction their faces are facing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-277452 A Summary of the Invention

[0005] An object of the present disclosure is to provide an infection risk assessment system, an infection risk assessment method, and a program that can improve the accuracy of infection risk assessment.

[0006] An infection risk assessment system according to one aspect of the present disclosure assesses the risk of infection of each of a plurality of subjects against an infectious disease. The infection risk assessment system includes a location information acquisition unit that acquires location information of each of the plurality of subjects, and a sound information acquisition unit that acquires sound information emitted by each of the plurality of subjects. The infection risk assessment system includes an infected person information acquisition unit that acquires infected person information for identifying the subject infected with the infectious disease, and a determination unit that determines whether or not the plurality of subjects are in close contact with each other at an arbitrary date and time and an arbitrary location based on the location information. The infection risk assessment system includes a storage unit that stores a determination result of the close contact by the determination unit, and an evaluation unit that evaluates the infection risk of each of the plurality of subjects based on the determination result, the sound information, and the infected person information stored in the storage unit.

[0007] An infection risk assessment method according to one aspect of the present disclosure assesses the infection risk of each of a plurality of subjects against an infectious disease. The infection risk assessment method includes a step of acquiring location information of each of the plurality of subjects, a step of acquiring sound information emitted by each of the plurality of subjects, and a step of acquiring infected person information for identifying the subject infected with the infectious disease. The infection risk assessment method includes a step of determining whether or not the plurality of subjects are in close contact with each other at an arbitrary date and time and an arbitrary location based on the location information, and a step of storing a determination result of the presence or absence of close contact. The infection risk assessment method includes a step of evaluating the infection risk of each of the plurality of subjects based on the stored determination result, the sound information, and the infected person information.

[0008] A program according to one embodiment of the present disclosure causes one or more processors to execute the infection risk assessment method. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a system configuration diagram of an infection risk assessment system according to an embodiment of the present disclosure. [Diagram 2]FIG. 2 is a time chart for explaining the operation of the infection risk assessment system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an infection risk assessment system, an infection risk assessment method, and a program according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0011] (1) Overview of the infection risk assessment system according to the embodiment An infection risk assessment system 1 according to the embodiment assesses the risk of infection of each of a plurality of subjects against an infectious disease. In the embodiment, "infectious disease" includes infectious diseases whose main mode of infection is droplet infection, for example, respiratory infections such as COVID-19 and influenza (seasonal influenza and novel influenza). Furthermore, a "subject" in the embodiment is a person who possesses a mobile communication terminal 2, such as a smartphone or tablet terminal, capable of executing a dedicated application (hereinafter abbreviated as an app), as described below. Furthermore, in the embodiment, "infection risk" is a numerical value indicating the possibility of contracting an infectious disease through close contact with an infected person.

[0012] (2) Configuration of the infection risk assessment system according to the embodiment As shown in Fig. 1, an infection risk assessment system 1 according to an embodiment (hereinafter, abbreviated as infection risk assessment system 1) includes a location information acquisition unit 10, a sound information acquisition unit 11, an infected person information acquisition unit 12, a determination unit 13, a memory unit 14, an evaluation unit 15, a video information acquisition unit 16, and a notification unit 17. The infection risk assessment system 1 may also include a plurality of imaging devices 3, a plurality of scanners 4, a location information server 5, and a plurality of mobile communication terminals 2. However, Fig. 1 illustrates only one each of the imaging device 3, the scanner 4, and the mobile communication terminal 2. The infection risk assessment system 1 can be realized, for example, by a computer system having one or more processors and a computer program executed by the processor of the computer system.

[0013] The computer system is mainly composed of a processor and a memory as hardware. The function of the infection risk assessment system 1 is realized by the processor executing a program recorded in the memory of the computer system. The program may be pre-recorded in the memory of the computer system, provided through an electric communication line, or recorded and provided in a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that can be read by the computer system. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits such as IC or LSI referred to here are called by different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, a field-programmable gate array (FPGA) that is programmed after the manufacture of the LSI, or a logic device that can reconfigure the connection relationship inside the LSI or reconfigure the circuit partition inside the LSI, can also be adopted as a processor. The electronic circuits may be integrated in one chip or distributed across multiple chips. The multiple chips may be integrated into one device, or may be distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0014] (2-1) Imaging device Each of the imaging devices 3 is installed so as to capture an image of a building's entrance, a corridor, a room, or other location from above. Each imaging device 3 has an imaging element such as a CMOS image sensor, a lens system that focuses light on the imaging element, an image processing circuit that compresses the image captured by the imaging element and sends it to the location information server 5, and the like. Each imaging device 3 transmits the image data (image information) compressed by the image processing circuit to the location information server 5. Note that communication between each imaging device 3 and the location information server 5 is performed via a wired LAN (Local Area Network). However, communication between each imaging device 3 and the location information server 5 may also be performed via a wireless LAN.

[0015] (2-2) Mobile communication terminals Each of the multiple mobile communication terminals 2 is carried by a single person. Each mobile communication terminal 2 periodically transmits a beacon signal (advertisement packet) using the Bluetooth (registered trademark) Low Energy communication method. A unique identification code (Bluetooth (registered trademark) Address) assigned to each mobile communication terminal 2 is set as the source address of this beacon signal.

[0016] Each mobile communication terminal 2 includes a control unit 20, a display unit 21, an operation input receiving unit 22, a sound input unit 23, a communication unit 24, a beacon transmission unit 25, and the like (see FIG. 1). The control unit 20 has a CPU (Central Processing Unit). The communication unit 24 has a communication circuit for Wi-Fi (registered trademark), or a communication circuit for Wi-Fi (registered trademark) and a communication circuit for mobile communication. The beacon transmission unit 25 has a communication circuit for Bluetooth (registered trademark) Low Energy. However, the control unit 20, the communication unit 24, and the beacon transmission unit 25 are integrally configured as a SoC (System on Chip) included in a smartphone or tablet terminal.

[0017] The display unit 21 has a display device such as a liquid crystal display or an organic EL display. The operation input receiving unit 22 has a touch panel, for example, and receives operation input by a touch operation of the subject. The display unit 21 and the operation input receiving unit 22 may be integrated as a touch panel display.

[0018] The sound input unit 23 has a microphone and an A / D conversion circuit that converts an analog sound signal input from the microphone into a digital sound signal (sound data). The sound input unit 23 outputs the digital sound signal (sound data) converted by the A / D conversion circuit to the control unit 20.

[0019] (2-3) Scanner At least one of the multiple scanners 4 is installed at each location where the multiple imaging devices 3 capture images. Each scanner 4 receives beacon signals transmitted from the multiple mobile communication terminals 2. Each scanner 4 transmits the signal strength (RSSI: Received Signal Strength Indication) of the received beacon signal and an identification code assigned to each scanner 4 to the location information server 5. Note that communication between each scanner 4 and the location information server 5 is performed via a wired LAN. However, communication between each scanner 4 and the location information server 5 may also be performed via a wireless LAN.

[0020] (2-4) Location information server The location information server 5 is realized, for example, by a computer system and a program executed by the computer system.

[0021] The location information server 5 communicates with each scanner 4 and estimates the location of each mobile communication terminal 2 (the location of the subject carrying the mobile communication terminal 2) based on the identification code of each scanner 4 and the signal strength of the beacon signal. The location information server 5 then stores the estimated location of each mobile communication terminal 2 in association with the identification code of each mobile communication terminal 2 and the time at which the beacon signal was received. In the following description, "location information" refers to information indicating the location of the mobile communication terminal 2 (subject) associated with the identification code of the mobile communication terminal 2 and the time.

[0022] Furthermore, the position information server 5 receives video data (video information) transmitted from the multiple imaging devices 3, and stores the received video data (video information) in association with the location and time at which the image was captured.

[0023] (2-5) Location information acquisition section The location information acquisition unit 10 acquires the location information of each mobile communication terminal 2 from the location information server 5. The location information of each mobile communication terminal 2 acquired by the location information acquisition unit 10 is stored in the storage unit 14 via the determination unit 13. Note that the location information acquisition unit 10 preferably performs data communication with the location information server 5 via a VPN (Virtual Private Network) or a WAN (Wide Area Network).

[0024] (2-6) Video information acquisition unit The video information acquisition unit 16 acquires the video information of each imaging device 3 from the position information server 5. The video information of each imaging device 3 acquired by the video information acquisition unit 16 is stored in the storage unit 14 via the determination unit 13. Note that it is preferable that the video information acquisition unit 16 performs data communication with the position information server 5 via a VPN or a WAN.

[0025] (2-7) Sound information acquisition unit The sound information acquisition unit 11 acquires sound information of the sound input unit 23 of each mobile communication terminal 2 from each mobile communication terminal 2 by data communication with the communication unit 24 of each mobile communication terminal 2. The sound information includes sound data input from the sound input unit 23 to the control unit 20 and the date and time when the sound data was input to the control unit 20. The sound information of each mobile communication terminal 2 acquired by the sound information acquisition unit 11 is stored in the memory unit 14 via the determination unit 13. The sound information acquisition unit 11 performs data communication with the communication unit 24 by Wi-Fi (registered trademark) or mobile communication.

[0026] (2-8) Infected person information acquisition department The infected person information acquisition unit 12 acquires the infected person information accepted by the operation input acceptance unit 22 of each mobile communication terminal 2 from each mobile communication terminal 2 by data communication with the communication unit 24 of each mobile communication terminal 2. The infected person information acquired by the infected person information acquisition unit 12 is stored in the memory unit 14 via the determination unit 13. The infected person information acquisition unit 12 performs data communication with the communication unit 24 by Wi-Fi (registered trademark) or mobile communication.

[0027] The infected person information includes the identification code of the mobile communication terminal 2 carried by the infected subject, the type of infectious disease with which the subject is infected, the date on which the infection was discovered (the date on which the subject was determined to be positive by a test), etc. The infected person information is input to the control unit 20 of the mobile communication terminal 2 by the infected subject himself / herself operating the operation input receiving unit 22 of his / her own mobile communication terminal 2. However, the infected person information acquiring unit 12 may acquire the infected person information registered by a third party other than the subject, for example, an administrator who manages the infection risk assessment system 1.

[0028] (2-9) Storage section The storage unit 14 has one or more auxiliary storage devices (hard disk devices, SSD devices, etc.). The storage unit 14 stores the location information, sound information, infected person information, and image information of each imaging device 3 of each mobile communication terminal 2 in the one or more auxiliary storage devices.

[0029] (2-10) Judgment section The determination unit 13 determines whether or not multiple subjects are in close contact with each other at an arbitrary date and time and an arbitrary location based on the location information. For example, the determination unit 13 refers to the location information of each mobile communication terminal 2 stored in the storage unit 14, and checks whether or not a situation in which the distance between two or more mobile communication terminals 2 is equal to or less than an upper limit value (e.g., 2 m) has continued for a predetermined time or more (e.g., one minute). Then, when the situation in which the distance between two or more mobile communication terminals 2 is equal to or less than the upper limit value has continued for a predetermined time or more, the determination unit 13 determines that each of the two or more mobile communication terminals 2 is in close contact. When the determination unit 13 determines that there is close contact, the determination result is stored in the storage unit 14. The determination result includes the identification code of each of the two or more mobile communication terminals 2 determined to be in close contact, the location information of each mobile communication terminal 2 when they were in close contact, the date and time of the close contact, and the duration of the close contact.

[0030] (2-11) Evaluation section The evaluation unit 15 evaluates the infection risk of each of the multiple subjects based on the judgment result of the judgment unit 13, the sound information, and the infected person information stored in the memory unit 14. Furthermore, the evaluation unit 15 selects two or more subjects who were in close contact (actually, the identification codes of the mobile communication terminals 2 carried by the subjects) from the multiple subjects based on the judgment result of the judgment unit 13. Then, the evaluation unit 15 evaluates the infection risk based on each of the sound information when the two or more subjects were in close contact. Furthermore, the evaluation unit 15 in the embodiment evaluates the infection risk based on each of the sound information and image information when the two or more subjects were in close contact.

[0031] For example, the evaluation unit 15 calculates an evaluation value for each of the following six parameters, and sets the sum of these six evaluation values ​​as the evaluation value of the infection risk.

[0032] The first parameter is the distance between subjects when they are in close proximity, with a score of 2 if the distance is less than 1m and a score of 1 if it is between 1m and 2m.

[0033] The second parameter is whether or not the subjects talk to each other when they are in close proximity, with a score of 2 for when there is conversation and 1 for when there is no conversation.

[0034] The third parameter is whether or not the subject coughs or sneezes while in close contact, with a score of 2 if the subject coughs or sneezes and a score of 1 if the subject does not cough or sneeze.

[0035] The fourth parameter is the time spent in close contact, and if the time spent in close contact is a threshold value (e.g., 15 minutes) or more, it is given a score of 2, and if it is less than the threshold value, it is given a score of 1. However, the threshold value is not limited to 15 minutes.

[0036] The fifth parameter is whether or not each person in close contact was wearing a mask (mask or not), with a score of 3 if everyone was not wearing a mask, a score of 2 if only one person was not wearing a mask, and a score of 1 if everyone was wearing a mask.

[0037] The sixth parameter was the orientation of the faces of each subject in close proximity, with a score of 3 if the faces were facing each other, a score of 2 if the faces were turned to the side, and a score of 1 if the faces were facing away from each other.

[0038] Here, the evaluation unit 15 determines the evaluation values ​​of the first parameter (distance) and the fourth parameter (close contact time) based on the close contact information stored in the storage unit 14. The evaluation unit 15 determines the evaluation values ​​of the second parameter (presence or absence of conversation) and the third parameter (presence or absence of coughing and sneezing) based on the sound information stored in the storage unit 14. The evaluation unit 15 determines the evaluation values ​​of the fifth parameter (presence or absence of mask) and the sixth parameter (face direction) based on the video information stored in the storage unit 14. The evaluation points for the first to sixth parameters are not limited to the above values. Furthermore, the parameters for evaluating the infection risk are not limited to the first to sixth parameters.

[0039] For example, if two subjects talk face to face without masks for 15 minutes or more, keeping a distance of less than 1 meter, and coughing, the evaluation values ​​of the first to sixth parameters will be 2, 2, 2, 2, 3, and 3. Therefore, in this case, the evaluation value of the infection risk for each of the two subjects will be 14 points (= 2 points + 2 points + 2 points + 2 points + 3 points + 3 points).

[0040] (2-12) Notification section The notification unit 17 notifies the subject of the evaluation value of the infection risk evaluated by the evaluation unit 15 by transmitting the evaluation value to the mobile communication terminal 2 carried by the subject. The notification unit 17 performs data communication with each mobile communication terminal 2 by Wi-Fi (registered trademark) or mobile communication.

[0041] Here, the location information acquisition unit 10, the sound information acquisition unit 11, the infected person information acquisition unit 12, the determination unit 13, the storage unit 14, the evaluation unit 15, the video information acquisition unit 16, and the notification unit 17 may be realized by a computer system and a program executed by the computer system. Alternatively, the location information acquisition unit 10, the sound information acquisition unit 11, the infected person information acquisition unit 12, the determination unit 13, the storage unit 14, the evaluation unit 15, the video information acquisition unit 16, and the notification unit 17 may be realized by being distributed among a plurality of computer systems.

[0042] (3) Operation of the infection risk assessment system Next, the operation of the infection risk assessment system 1 will be described with reference to the time chart of FIG.

[0043] An application (hereinafter, abbreviated as app) for collecting sound information and transmitting it to the infection risk assessment system 1 is installed on each mobile communication terminal 2. Each mobile communication terminal 2 executes the above app on the control unit 20, thereby transmitting the sound information to the location information server 5 at regular intervals (for example, every one second to several tens of seconds) (see [1] in FIG. 2).

[0044] Furthermore, each imaging device 3 transmits captured image data (image information) to the position information server 5 at regular intervals (for example, every one second to several tens of seconds) (see [2] in FIG. 2).

[0045] The location information server 5 sends the sound information received from each mobile communication terminal 2 to the determination unit 13 via the sound information acquisition unit 11 (see [3] in FIG. 2). However, the location information server 5 may detect the presence or absence of conversation, coughing, and sneezing from the acoustic data, and include the detected presence or absence of conversation, coughing, and sneezing in the sound information.

[0046] Furthermore, the location information server 5 sends the image information received from each imaging device 3 to the determination unit 13 via the image information acquisition unit 16 (see [3] in FIG. 2). However, the location information server 5 may detect the facial orientation of the subject and the presence or absence of a mask from the image data, and include the detected facial orientation and the presence or absence of a mask in the image information.

[0047] The determination unit 13 determines whether or not there is close contact between multiple subjects at an arbitrary date and time and an arbitrary location based on the location information (see [4] in FIG. 2). When the determination unit 13 determines that there is close contact, it stores the determination result in the storage unit 14 (see [5] in FIG. 2). In addition, the determination unit 13 notifies each mobile communication terminal 2 of the determination result of whether or not there is close contact via the notification unit 17 (see [6] in FIG. 2).

[0048] Next, the operation of the infection risk assessment system 1 when an infection occurs among the subjects of the infection risk assessment system 1 will be described.

[0049] In the infection risk assessment system 1, the evaluation unit 15 acquires infected person information from the memory unit 14 (see [7] in FIG. 2). Then, the evaluation unit 15 identifies the infected subject from the infected person information, and then selects subjects who have been determined to have been in close contact with the infected person during the period up to one week or two weeks prior to the date on which the infection was discovered (hereinafter, these may be referred to as close contacts). Note that when selecting close contacts, the evaluation unit 15 refers to the judgment results of the judgment unit 13 stored in the memory unit 14.

[0050] The evaluation unit 15 calculates an evaluation value of the infection risk between the selected close contact and the infected person (see [8] in FIG. 2). The evaluation unit 15 notifies the calculated evaluation value of the infection risk to the mobile communication terminal 2 carried by the close contact through the notification unit 17 (see [9] in FIG. 2). However, the evaluation unit 15 may create an evaluation index that divides the evaluation value of the infection risk into several stages, and notify the created evaluation index to the mobile communication terminal 2 carried by the close contact together with the evaluation value of the infection risk or instead of the evaluation value of the infection risk. It is preferable that the evaluation index is, for example, "very high" when the evaluation value of the infection risk is between 14 points and 11 points, "high" when it is between 10 points and 7 points, "low" when it is between 6 points and 3 points, and "very low" when it is between 2 points and 0 points.

[0051] For example, assume that multiple subjects work in the same office. Each subject runs the app on his / her mobile communication terminal 2 before coming to work every morning, and receives the assessment value of close contact and infection risk up to the previous day from the infection risk assessment system 1. Each subject can then decide the work style for that day (working in the office, working from home, or taking a vacation) based on the assessment value of close contact and infection risk up to the previous day received from the infection risk assessment system 1.

[0052] Furthermore, if an infection occurs among the subjects, the infection risk assessment system 1 notifies the mobile communication terminal 2 of the subject who has had close contact with the infected person of the infection risk assessment value. The subject who has been notified of the infection risk assessment value can select and take appropriate action based on the assessment value, such as taking an infectious disease test or working from home instead of coming to the office. As a result, the infection risk assessment system 1 can contribute to preventing the spread of infectious diseases.

[0053] (4) Advantages of the infection risk assessment system As described above, the infection risk assessment system 1 assesses the infection risk based not only on the location information of the subject but also on sound information emitted by the subject (for example, information on the sound of a conversation, coughing, and sneezing). Therefore, the infection risk assessment system 1 has the advantage of being able to improve the accuracy of infection risk assessment compared to a case where the infection risk is assessed only from the distance to an infected person and the contact time with the infected person.

[0054] Furthermore, the infection risk assessment system 1 assesses the infection risk based on, in addition to the sound information, image information capturing an image of a place where an infected person and a target person were in close contact, for example, the orientation of the infected person's and target's faces, whether or not they are wearing masks, etc. As a result, the infection risk assessment system 1 has the advantage of being able to further improve the accuracy of infection risk assessment.

[0055] Furthermore, the evaluation unit 15 calculates an evaluation value that quantifies the infection risk based on multiple parameter values ​​including the distance when two or more subjects were in close contact, the time they were in close contact, whether they talked when they were in close contact, the direction of their faces when they were in close contact, and whether they wore a mask. Thus, the infection risk assessment system 1 has the advantage that it makes it easier for subjects to recognize the infection risk by quantifying the infection risk as an evaluation value.

[0056] In addition, the infection risk assessment system 1 notifies the subject of the infection risk assessed by the assessment unit 15 via the notification unit 17, which has the advantage of being able to reliably inform the subject of the infection risk.

[0057] (5) Infection risk assessment method and program The infection risk assessment method according to the embodiment includes a step of acquiring location information of each of a plurality of subjects, a step of acquiring sound information emitted by each of the plurality of subjects, and a step of acquiring infected person information for identifying a subject infected with an infectious disease. The infection risk assessment method according to the embodiment includes a step of determining whether or not a plurality of subjects are in close contact with each other at an arbitrary date and time and an arbitrary location based on the location information, and a step of storing a determination result of whether or not there is close contact. The infection risk assessment method according to the embodiment includes a step of evaluating the infection risk of each of the plurality of subjects based on the stored determination result, sound information, and infected person information.

[0058] The infection risk assessment method according to the embodiment may be executed by the above-described infection risk assessment system 1, or may be realized by causing one or more processors to execute a program (computer program) according to the embodiment.

[0059] According to the infection risk assessment method and program of the embodiment, the accuracy of infection risk assessment can be improved compared to when infection risk is assessed based only on the distance from an infected person and the contact time with an infected person.

[0060] (6) Summary An infection risk assessment system (1) according to a first aspect of the present disclosure assesses the risk of infection of each of a plurality of subjects against an infectious disease. The infection risk assessment system (1) according to the first aspect includes a location information acquisition unit (10), a sound information acquisition unit (11), an infected person information acquisition unit (12), a determination unit (13), a storage unit (14), and an evaluation unit (15). The location information acquisition unit (10) acquires location information of each of the plurality of subjects. The sound information acquisition unit (11) acquires sound information emitted by each of the plurality of subjects. The infected person information acquisition unit (12) acquires infected person information for identifying a subject infected with an infectious disease. The determination unit (13) determines whether or not the plurality of subjects are in close contact with each other at an arbitrary date and time and an arbitrary location based on the location information. The storage unit (14) stores the result of the determination by the determination unit (13) as to whether or not there is close contact. The evaluation unit (15) evaluates the infection risk of each of the multiple subjects based on the determination results, sound information, and infected person information stored in the memory unit (14).

[0061] The infection risk assessment system (1) according to the first aspect can improve the accuracy of infection risk assessment compared to a case where the infection risk is assessed only from the distance to an infected person and the contact time with an infected person.

[0062] An infection risk assessment system (1) according to a second aspect of the present disclosure can be realized by combining with the first aspect. In the infection risk assessment system (1) according to the second aspect, it is preferable that the assessment unit (15) selects two or more subjects who were in close contact from among the multiple subjects based on the judgment result. It is preferable that the assessment unit (15) assesses the infection risk based on each of the sound information when the two or more subjects were in close contact.

[0063] The infection risk assessment system (1) of the second aspect can further improve the accuracy of infection risk assessment by assessing the infection risk based on sound information emitted by the subject (e.g., information on the sounds of talking, coughing, and sneezing).

[0064] The infection risk assessment system (1) according to the third aspect of the present disclosure can be realized by combining with the first or second aspect. The infection risk assessment system (1) according to the third aspect preferably further includes an image information acquisition unit (16) that acquires image information of an image of a location. The assessment unit (15) preferably assesses the infection risk based on the sound information and image information of two or more subjects who are in close contact with each other.

[0065] The infection risk assessment system (1) of the third aspect can further improve the accuracy of infection risk assessment by assessing the infection risk by adding video information such as the facial orientation of the infected and subject persons and the presence or absence of a mask.

[0066] An infection risk assessment system (1) according to a fourth aspect of the present disclosure can be realized by combining with the third aspect. In the infection risk assessment system (1) according to the fourth aspect, it is preferable that the assessment unit (15) calculates an assessment value that quantifies the infection risk based on values ​​of a plurality of parameters including the distance when two or more subjects were in close contact, the time when they were in close contact, the presence or absence of conversation when they were in close contact, the direction of the faces when they were in close contact, and the presence or absence of a mask.

[0067] The infection risk assessment system (1) according to the fourth aspect makes it easier for the subject to recognize the infection risk by converting the infection risk assessment into a numerical assessment value.

[0068] An infection risk assessment system (1) according to a fifth aspect of the present disclosure can be realized by combining with any of the first to fourth aspects. It is preferable that the infection risk assessment system (1) according to the fifth aspect further includes a notification unit (17) that notifies a subject who has been in close contact with a subject identified in the infected person information of the infection risk assessed by the evaluation unit (15).

[0069] The infection risk assessment system (1) according to the fifth aspect notifies the subject of the infection risk assessed by the assessment unit (15) via the notification unit (17), thereby making it possible to reliably inform the subject of the infection risk.

[0070] An infection risk assessment method according to a sixth aspect of the present disclosure assesses the infection risk of each of a plurality of subjects against an infectious disease. The infection risk assessment method according to the sixth aspect includes a step of acquiring location information of each of the plurality of subjects, a step of acquiring sound information emitted by each of the plurality of subjects, and a step of acquiring infected person information for identifying a subject infected with an infectious disease. The infection risk assessment method according to the sixth aspect includes a step of determining whether or not there is close contact between the plurality of subjects at an arbitrary date and time and an arbitrary location based on the location information, and a step of storing a determination result of whether or not there is close contact. The infection risk assessment method according to the sixth aspect includes a step of evaluating the infection risk of each of the plurality of subjects based on the stored determination result, sound information, and infected person information.

[0071] The infection risk assessment method according to the sixth aspect can improve the accuracy of infection risk assessment compared to a case in which the infection risk is assessed only from the distance to an infected person and the contact time with an infected person.

[0072] A program according to a seventh aspect of the present disclosure causes one or more processors to execute the infection risk assessment method according to the sixth aspect.

[0073] The program according to the seventh aspect can improve the accuracy of infection risk assessment compared to a case where the infection risk is assessed only from the distance to an infected person and the contact time with an infected person. [Explanation of symbols]

[0074] 1. Infection risk assessment system 2. Mobile communication devices 10 Location information acquisition section 11 Sound information acquisition unit 12 Infected person information acquisition department 13 Judgment section 14 Storage section 15 Evaluation Section 16 Video information acquisition unit 17 Notification Department

Claims

1. An infection risk assessment system for assessing the infection risk of each of a plurality of subjects for an infectious disease, comprising: A location information acquisition unit that acquires location information of each of the plurality of subjects; A sound information acquisition unit that acquires sound information emitted by each of the plurality of subjects; an infected person information acquisition unit that acquires infected person information for identifying the subject infected with the infectious disease; A determination unit that determines whether or not the plurality of subjects are in close contact with each other at an arbitrary date and time and at an arbitrary location based on the position information; A storage unit that stores a result of the close contact determination by the determination unit; an evaluation unit that evaluates the infection risk of each of the plurality of subjects based on the determination result, the sound information, and the infected person information stored in the storage unit; Equipped with Infection risk assessment system.

2. The evaluation unit selects two or more subjects who were in close contact from among the plurality of subjects based on the determination result, and evaluates the infection risk based on the sound information of each of the two or more subjects when they were in close contact. The infection risk assessment system according to claim 1.

3. An image information acquisition unit that acquires image information of the location is further provided, The evaluation unit evaluates the infection risk based on the sound information and the image information when the two or more subjects are in close contact with each other. The infection risk assessment system according to claim 2.

4. The evaluation unit calculates an evaluation value that quantifies the infection risk based on values ​​of a plurality of parameters including the distance when the two or more subjects were in close contact, the time when they were in close contact, whether or not they talked when they were in close contact, the direction of their faces when they were in close contact, and whether or not they wore a mask. The infection risk assessment system according to claim 3.

5. A notification unit that notifies the subject who has been in close contact with the subject identified in the infected person information of the infection risk evaluated by the evaluation unit. The infection risk assessment system according to any one of claims 1 to 4.

6. An infection risk assessment method for assessing the infection risk of each of a plurality of subjects for an infectious disease, comprising: acquiring location information of each of the plurality of subjects; acquiring sound information emitted by each of the plurality of subjects; acquiring infected person information for identifying the subject infected with the infectious disease; A step of determining whether or not the plurality of subjects are in close contact with each other at an arbitrary date and time and at an arbitrary location based on the location information; A step of storing a result of the close contact determination; Evaluating the infection risk of each of the plurality of subjects based on the stored determination results, the sound information, and the infected person information; having Infection risk assessment methods.

7. One or more processors, Executing the infection risk assessment method according to claim 6, program.

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