With the Delta variant in play, federal health officials are analyzing the latest numbers to look at the frequency and seriousness of COVID-19 breakthrough infections. Will we need booster shots? And ...

The US Centers for Disease Control and Prevention strengthened recommendations for booster doses of coronavirus vaccine Monday, saying all adults should get boosted six months after the second dose of ...

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 ...

In "sobering news," omicron can evade the protection initial vaccines give, but boosters increase efficacy and better protect against the newest variant of concern, Dr. Anthony Fauci said Sunday. The ...

Cases of the new COVID-19 variant NB.1.8.1, linked to a large surge in China, have been detected in multiple locations across the United States, according to the Centers for Disease Control and ...

"We are encouraged by these new data, which reinforce our confidence that the Moderna COVID-19 Vaccine should be protective against these newly detected variants," Moderna CEO Stéphane Bancel said in ...

The U.S. Centers for Disease Control and Prevention on Monday expanded its recommendation for COVID-19 booster shots to all adults 18 and older, according to a CDC news release. "Today, CDC is ...

Moderna announced Wednesday it is studying three different ways to combat a variant of the COVID-19 virus that was originally found in South Africa. The South African variant has been of particular ...