Influenza natural history, complications and prognosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] ; Associate Editor(s)-in-Chief: Ammu Susheela, M.D. [2]

Overview

Possible complications, especially for those at high risk, include:

The flu can also make some health problems worse. These health problems include:

Anyone at any age can have serious complications from the flu, but those at highest risk include:

People over age 50
Children between 6 months and 2 years
Women more than 3 months pregnant during the flu season
Anyone living in a long-term care facility
Anyone with chronic heart, lung, or kidney conditions, diabetes, or a weakened immune system

In most individuals who are otherwise healthy, the flu goes away within 7 to 10 days.