The invention discloses an infectious
disease infection risk prediction method and device and a storage medium. The method comprises the steps that of first space-
time trajectory information of a to-be-detected user is obtained locally from first equipment, then an encrypted target prediction model of infectious
disease infection risks is obtained, the first space-
time trajectory information is input into the encrypted target prediction model, and an infectious
disease infection risk result corresponding to the to-be-detected user is obtained. Obtaining; an
encryption prediction model of the infectious disease
infection risk is acquired by utilizing the space-time track information of the definite diagnosis user; infection
risk detection of the to-be-detected user is realized; whole duringthe detection process, wherein the target prediction model is obtained based on the space-
time trajectory information of the infectious disease definite diagnosis user; c. Compared with the prior art, the method has the advantages that the a model is encrypted, the unknown original space-time trajectory of the user is diagnosed, the user to be detected does not need to share the space-time trajectory information, infection
risk detection is completed locally, the space-time trajectory information of the user can be protected, and leakage of
user privacy is effectively avoided.