Dr. Jessica Shepherd, chief medical officer for Hers, joins ABC News Live to discuss the flu season and flu vaccine.

The outbreak blamed on "gym exposure" is relatively small, but it has helped push cases tied to the Legionella bacteria to a 10-year high in Florida.

Over the last several months, HHS Secretary Robert F. Kennedy Jr. has significantly weakened the vaccine infrastructure that ...

Recent weeks have brought good news about vaccines, with studies indicating that flu vaccination reduces heart disease, ...

Canada is what makes us the most nervous because it’s our neighbor,” Green said. “Canada’s really rough, early flu season is probably going to hit us after everyone ...

A Washington state resident is believed to be the first person to die from a rare strain of bird flu, but state health ...

Vinay Prasad’s memo makes alarming claims about the COVID-19 vaccine — including the assertion, made without any supporting ...

An internal memo written by the Food and Drug Administration's top vaccine regulator offers a concerning glimpse into the future of vaccine regulation in the US -- and could have profound implications ...