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.

AUSTIN (KXAN) — We’re learning more about exactly how the Pfizer COVID-19 vaccine works from research scientists at the University of Texas at Austin who helped develop it. “The way the Pfizer vaccine ...

Dramatic changes wrought by health secretary Robert F. Kennedy Jr. on vaccine regulation in the U.S. are making this year’s launch of the updated Covid-19 shots the rockiest in years, with sharply ...

PHILADELPHIA -- To help fend off another wave of Covid-19, people will need a fourth dose of vaccine, Pfizer CEO Albert Bourla said Sunday. "Many variants are coming, and Omicron was the first one ...

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

KING OF PRUSSIA, Pennsylvania (WPVI) -- More people will soon be eligible for the COVID-19 vaccine following the FDA's approval for emergency use of the Pfizer shot on kids ages 12 to 15. A federal ...