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 ...

The Food and Drug Administration today authorized both Pfizer and Moderna to give a second booster dose of their COVID-19 vaccines to individuals aged 50 and older and to those who are ...

The U.S. Food and Drug Administration has authorized booster shots of the Moderna and Pfizer COVID-19 vaccines for all adults ages 18 and older. On Friday, the FDA announced it had amended the ...

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 ...

A third dose of the Pfizer/BioNTech COVID-19 vaccine can "strongly" boost protection against the delta variant -- beyond the protection afforded by the standard two doses, suggests new data released ...

FILE - In this photo illustration, Pfizer-BioNTech COVID-19 (L) and Moderna COVID-19 vaccines fill their syringes at Borinquen Health Care Center on May 29, 2025 in Miami, Florida. (Photo illustration ...

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 that was able to ...

Vaccinators will be able to get one extra dose out of each vial of Moderna’s Covid-19 vaccine, and soon new vials that hold even more doses will become available. The changes were among those ...

The excitement of two COVID-19 vaccines with more than 90 percent efficacy is undeniable. In November, both Pfizer and Moderna announced its scientists had developed vaccines with efficacy at or near ...

SAN FRANCISCO -- Herculean efforts by scientists and physicians around the world have resulted more than 50 experimental COVID-19 vaccines currently in global clinical trials. The focus in the U.S.