Medically reviewed by Kate Colby, MPHFlu A affects both humans and animals, while flu B affects only humans. You may notice that flu A tends to appear earlier in the flu season than flu B. You can ...

Dear A.T.R.: Both colds and influenza (the "flu") are respiratory illnesses that are caused by viruses. Influenza is caused ...

The main strains of influenza virus circulating now are similar to those that caused the severe outbreaks last season.

The flu is contagious until your temperature has returned to normal and you've been without a fever for at least 24 hours.

The flu season has arrived with more than just sniffles and coughs. Across the Philippines, cases of influenza-like illness (ILI) are quietly climbing, prompting schools to suspend face-to-face ...

The Marion County Health Department says it will be challenging to anticipate what's to come with the CDC influenza map not ...