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Flu Science

How Flu Spreads

About 5% to 20% of the U.S. population gets the flu every year. The CDC estimates that there have been 9 to 41 million flu illnesses a year between 2010 and 2020.

While getting vaccinated is the most effective way of avoiding the flu, understanding how the flu spreads is a big step towards prevention.

Sep 6, 2022
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Flu Burden

How Flu Creates a Burden on Society

Read about the impact of seasonal flu—and of vaccinations.

Sep 7, 2022
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Flu Complications

Why Does Flu Affect Some People More Than Others?

Certain people may have higher risk factors for influenza complications.

Sep 5, 2022