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 ...

A stunning new study offers early evidence that COVID-19 vaccines might have a secret superpower: a precisely timed mRNA shot could help many cancer patients live longer.

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 ...

Moderna is suing Pfizer and BioNTech for infringing patents central to Moderna's mRNA technology platform used to develop the COVID vaccine, the company said in a press release Friday. A widely ...

SAN FRANCISCO -- Another COVID-19 vaccine -- AstraZeneca -- is poised to arrive in the U.S., bringing a fourth option for Americans. Each vaccine is administered slightly differently, some can result ...

SAN FRANCISCO -- As more people are eligible to get vaccinated, reports of side effects after the second Pfizer and Moderna shots are surfacing. Dr. Robert Wachter, chief of medicine at UCSF says many ...

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 ...

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 ...

Moderna has filed a lawsuit against Pfizer and its German partner BioNTech for allegedly copying their COVID-19 vaccine. On Friday, Moderna issued a news release accusing Pfizer of infringing several ...

As the race for the coronavirus vaccine continues, those in the trials for both Moderna and Pfizer are describing the side effects. "I'm Jennifer Haller and I'm the first person in the U.S. to trial ...