In a large-scale trial, modRNA was significantly better at preventing confirmed flu cases than a typical seasonal flu shot.

The vaccine and a dominant variant may not match this year, which combined with low vaccine rates could make for a severe flu season.

(CNN) - For the first time this flu season, many Americans will have the option to give themselves the flu vaccine. FluMist is now approved by the U.S. Food and Drug Administration for use at home, ...