Why flu season spikes in the fall and winter

By Jennifer Larson
November 15, 2019

For the past 35 years, flu activity in the US has peaked in February, according to the Centers for Disease Control and Prevention, so the shortest month of the year might not feel that way for the many infected.

But February isn’t the only month you can contract the flu. In fact, it’s always flu season somewhere in the world.

In the Northern Hemisphere, including the US, “flu season typically picks up around October, and it can usually peak between December and February,” says Amanda Simanek, associate professor of epidemiology at the University of Wisconsin-Milwaukee’s Joseph J. Zilber School of Public Health.

“But we can see cases as late as into April and May,” she adds.

Read the full article here.