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 ...

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 ...

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 ...

All but one positive Covid-19 test sample sequenced this week from Erie County turned out to be the Delta variant, a strain wreaking havoc in several Southern states and regions across the country ...

The World Health Organization and the Centers for Disease Control and Prevention have both designated beta as a “variant of ...

Vaccine effectiveness against COVID-19 infection dropped from 91% to 66% once the delta variant accounted for the majority of circulating virus, according to a study published Tuesday by the U.S.

One thing we know for sure about SARS-CoV-2, the virus that causes COVID-19, is that it keeps changing. Since the start of the pandemic, we have seen several notable variants, including Alpha, Beta, ...

Number of Covid hospital admissions in England at highest level for nearly five months; Chile’s Institute of Public Health approves Russia’s Sputnik V jab ...

Vaccine breakthrough infections occur when individuals contract SARS-CoV-2 despite completion of an authorised immunisation schedule. These events have risen in prominence as viral variants acquire ...