LOS ANGELES -- The COVID-19 vaccines made by Pfizer and Moderna both require two doses to be administered, several weeks apart, for them to be fully effective. But there has been some scientific ...

Pfizer Inc.’s covid-19 vaccine remained highly effective after six months, according to new long-term results that the company said could be used to seek an expansion of its regulatory status.

(NEXSTAR) – News is developing so quickly when it comes to COVID-19 booster shots, it can be hard to keep track of what’s happening. Have they been approved? Am I eligible? When can I get one? The ...

Pfizer is paying $30 million to use Novavax’s adjuvant technology to improve the efficacy of two of the Big Pharma’s vaccine ...

The Food and Drug Administration has issued approval for a booster shot of Pfizer's COVID-19 vaccine for children as young as 12. The Pfizer vaccine is the first booster shot to receive emergency ...

WASHINGTON — U.S. regulators approved updated COVID-19 shots Wednesday but limited their use for many Americans — and removed one of the two vaccines available for young children. The new shots from ...