Duration of Precautions

Isolation precautions should be continued for seven days from symptom onset or until the resolution of symptoms, whichever is longer.

Patients with H1N1 influenza should be considered potentially contagious from one day before to seven days following illness onset. Patients who continue to be ill longer than seven days after illness onset should be considered potentially contagious until symptoms have resolved. Children, especially younger children, might be contagious for longer periods.

Adapted for the Web by the American Medical Association.
Source: Centers for Disease Control and Prevention.