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 ...

Moderna says its vaccine is 93% effective against symptomatic illness at six months (though this data collection ended before delta emerged in the U.S.). Moderna said its booster candidates also ...

A new preprint study suggests that Moderna’s COVID-19 vaccine may be significantly more effective against symptomatic disease from the delta variant compared to Pfizer-BioNTech’s vaccine, while the ...

Moderna said its COVID-19 vaccine demonstrated 93 percent efficacy, with efficacy remaining durable through six months after the second dose’s administration. The announcement was based on a new ...

SAN FRANCISCO (KGO) -- Bay Area doctors and health officials are concerned about the rapid spread of the COVID-19 Delta variant, warning significant outbreaks could trigger a setback for the state.

WASHINGTON - In a press briefing Friday, the head of the WHO said the delta variant is "quickly becoming the dominant strain in many countries," and thus, the world is in a "very dangerous period" of ...

NEW YORK (WABC) -- Pfizer and BioNTech say if a variant that evades the vaccine emerges, they would be ready to produce a tailor-made shot against that new variant within about 100 days. The companies ...

"The rules have changed. We have a different epidemic now that we did in May." Adding more insight into the CDC’s updated mask guidance, newly published details of the Provincetown outbreak raise ...

The more contagious Delta variant of Covid-19 now makes up 83% of sequenced samples in the United States, US Centers for Disease Control and Prevention Director Dr. Rochelle Walensky said Tuesday.