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 ...

COVID-19 is seen on the rise again in the United States as late summer sets in full-swing, and while health officials plan to restrict booster shots. Experts say that although cases of the new ...

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 ...

Neutralizing antibody levels rose 37-fold one month after the booster was given. Moderna announced Monday that its COVID-19 vaccine booster increases antibody levels against the omicron variant within ...

The U.S. on Wednesday authorized its first update to COVID-19 vaccines, booster doses that target today's most common omicron strain. Shots could begin within days. The move by the Food and Drug ...

Delaware officials say the overall number of COVID-19 cases is falling – there have been just over 5,200 reported cases this year, according to the Delaware Department of Health and Social Services – ...

A new COVID-19 variant, NB.1.8.1, first detected in China in January, has been designated as a variant of interest by the WHO. Less than 20 cases of NB.1.8.1 have been reported in the U.S. as of May ...

Scientists say new Covid-19 variant that is spreading globally. Known as the XEC strain, it originated in Europe and has been showing signs of transmitting more readily than predecessors. It's ...

NEW YORK (WABC) -- Encouraging new data suggests the omicron variant, while highly contagious, is less severe than the delta variant. The variant has now been found in 21 states, as the U.S. continues ...