The present invention provides a method of treating asthma by administering a therapeutically effective amount of an antiviral agent to a patient. The antiviral agent may be a neuraminidase inhibitor, a viral fusion inhibitor, a protease inhibitor, a DNA polymerase inhibitor, a signal transduction inhibitor, a nucleoside reverse transcriptase inhibitor (NRTI), a non-nucleoside reverse transcriptase inhibitor (NNRTI) or an interferon. The antiviral agent may be administered to the patient by inhalation, nasally, intravenously, orally, subcutaneously, intramuscularly or transdermally. For example, the antiviral agent may be formulated for delivery as aerosols to the patient.