Flu cases are rising across the U.S. Here's what you need to know about symptoms, flu duration and the new strain ...

The immune system’s first encounter with a virus or vaccine establishes a “starting template” that shapes its response to new ...

What started as an ad-hoc project shared by two of San Diego’s key research institutions is now a permanent part of the ...

Those infected with the flu are most contagious during the first three days, the CDC said. In some cases, however, people can ...

As North Carolina illness rates spike post-holidays, here's what to know about the spread of flu, stomach flu and COVID-19.

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