Add Yahoo as a preferred source to see more of our stories on Google. Looking to get a COVID-19 vaccine booster for yourself or your child this fall? It may be a bit more complicated than just making ...

According to a study of more than 5.5 million adults aged 50 years or older, vaccination with the bivalent BA.1 mRNA booster ...

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 ...

NEW YORK -- This holiday season held promise for Americans, many of whom spent Christmas 2020 in quarantine or away from loved ones due to a nasty winter COVID-19 surge. Yet in the last week or so, ...

Covid vaccines continue to protect against serious illness and death, especially for people ages 65 and older, although the benefits for younger adults are not as clear, according to a large new study ...

Separate VSD analyses confirmed no increased risk of all-cause mortality, cardiac mortality, or non-COVID mortality in the 28 ...

"As these viruses continue to evolve, public health officials watch carefully to see whether new strains will be more easily ...