The outbreak of coronavirus infections, including COVID-19 vaccine breakthrough infections, is associated with large public gatherings, including one in Barnstable County, Massachusetts, according to ...

Johnson & Johnson said Thursday that new data shows that its single-shot COVID-19 vaccine provides protection against the virus for at least eight months and effectively prevents infection from ...

NEW YORK, N.Y. — Pfizer announced Wednesday that data shows a third dose of its COVID-19 vaccine can “strongly” boost protection against the highly transmissible delta variant. The pharmaceutical and ...

Rochelle Walensky, the director of the Centers for Disease Control and Prevention, said earlier this week that she expects the delta variant to become the dominant coronavirus strain in the United ...

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 ...

WASHINGTON -- President Joe Biden said Tuesday afternoon that a mandate to require all federal employees to be vaccinated is now "under consideration." Sources familiar with the discussion told ABC ...

TEMPLE, Texas — A Central Texas man and Army veteran is fighting for his life at Baylor Scott and White Medical Center in Temple after he contracted the Delta variant of COVID-19. Longtime friend Lisa ...

PITTSBURGH (KDKA-TV) - A 73-year-old man is recovering at the VA Hospital in Oakland, Pennsylvania after contracting the Delta variant of the COVID-19. There is a critical twist in his story, however: ...

LAS VEGAS, NEVADA -- A California couple says they were fully vaccinated, but still contracted COVID-19 while on vacation as experts say breakthrough cases are possible, especially with the delta ...

MARSHALLTOWN, Iowa -- As COVID cases continue to surge across the U.S. due to the Delta variant, an Iowa doctor took to social media to urge vaccinations. He started off by saying, "I feel like I ...

Moderna on Tuesday released preliminary data indicating its vaccine is likely to hold up against several variants of concern, including the Delta variant, which is predicted to become the dominant ...