What is the incubation period of influenza?

Updated: Aug 07, 2020
  • Author: Hien H Nguyen, MD, MS; Chief Editor: Michael Stuart Bronze, MD  more...
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The incubation period of influenza averages 2 days but may range from 1 to 4 days in length. Because of aerosol transmission, and the possibility (albeit less likely) of transmission by asymptomatic persons and contaminated surfaces, the patient may be unaware of exposure to the disease. [16]

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