The Centers for Disease Control and Prevention listed the COVID-19 delta variant as one of its "variants of concern" (VOCs) on June 15. According to the CDC, VOCs can be more contagious, more ...

The delta variant is fueling the COVID-19 surge in the United States, but experts warn that a more dangerous variant could emerge if more Americans don't get vaccinated. Delta is the most recent of ...

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 ...

While the delta COVID-19 variant is the dominant strain in the U.S., it’s now officially the dominant strain worldwide “by far,” officials from the World Health Organization said during a Sept. 21 ...

The COVID-19 pandemic was the third leading cause of death globally in 2020 and the second in 2021, according to a recent World Health Organization report. The almost 13 million lives lost during ...

NEW YORK - Pfizer on Wednesday shared data about a third dose of its COVID-19 vaccine that suggests it "strongly" boosts protection against the more contagious delta variant of the coronavirus, which ...

On Tuesday, the U.S. Centers for Disease Control and Prevention updated its guidance to recommend that fully vaccinated people again wear face masks indoors if they are in an area where the novel ...

The delta variant of SARS-CoV-2, the virus that causes COVID-19, has been making headlines as it has quickly become the most prevalent strain in America. But other variants of the virus are still out ...