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 ...

NEW YORK - The U.S government’s first look at the real-world use of COVID-19 vaccines found their effectiveness was nearly as robust as it was in controlled studies. The two vaccines available since ...

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.

Despite a U.S. factory mixup, more Johnson & Johnson doses are becoming available in the U.S., marking the only single-shot vaccine option. So how effective is it and how does it compare to the Pfizer ...

(Reuters) – The first dose of Pfizer Inc and BioNTech’s COVID-19 vaccine is 85% effective, a study of Israeli healthcare workers published in The Lancet https ...

The Pfizer/BioNTech vaccine is 93% effective in preventing hospitalization due to Covid-19 among children ages 12 to 18, according to a study by the US Centers for Disease Control and Prevention.

Pfizer and BioNTech announced Monday their coronavirus vaccine was more than 90% effective in preventing COVID-19 among those without evidence of prior infection, hailing the development as “a great ...

Pfizer and BioNTech on Thursday said a booster shot of their COVID-19 vaccine was 95.6% effective in preventing infection from the virus compared to those who did not receive a third dose. In a press ...

(Reuters) - The second dose of Pfizer Inc's COVID-19 vaccine could be delayed in order to cover all priority groups as the first one is highly protective, two Canada-based researchers said in a letter ...

LOS ANGELES - Following the recent emergency approval by U.S. regulators for a coronavirus vaccine from Johnson & Johnson which contains a single-dose regimen, some medical experts are saying one dose ...

In a new document posted ahead of a key meeting of the US Food and Drug Administration's vaccine advisers, Pfizer says its vaccine is safe and 90.7% effective against symptomatic Covid-19 in children ...