Aim higher, reach further.

Burning Question | Why Is Flu Common in Winter?


Scientists have struggled to understand the correlation between cold weather and the flu. This winter has seen a particularly severe flu season for a number of reasons. A wintertime spike in flu cases isn't only because of the chill outside, says Linsey C. Marr, a professor of civil and environmental engineering at Virginia Tech. It's also because of the conditions inside.

The Air Test


Popular on WSJ