Most vaccines -- and boosters -- are injected directly into muscle tissue, usually in the upper arm, to kickstart the body's immune system in the fight against disease. But for respiratory diseases ...

With new testing requirements, it’s not even clear how new Covid or flu shots can be made available this fall.

FDA Commissioner Marty Makary said his agency plans to release a new framework for vaccine approvals in “coming days.” ...

Pfizer (PFE) stock draws public scrutiny as a House probe gathers new allegations regarding the company's COVID-19 vaccine ...