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 ...

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 ...

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 ...

LOS ANGELES (KABC) -- While overall COVID-19 rates remain relatively low in Southern California amid continuing vaccination efforts, officials are increasingly worried about a growing threat from the ...

Once fully vaccinated, Pfizer-BioNTech’s and AstraZeneca’s COVID-19 vaccines are effective against B.1.617.2, a more transmissible variant first detected in India, the U.K.’s public health agency ...

Moderna said its updated shot produced an 8.7-fold increase in protective antibodies against BA.2.86 in a clinical trial. Pfizer separately said its jab generated protective antibodies against that ...

SAN FRANCISCO -- Earlier in the pandemic, experts had hoped if we can get 75% of Americans vaccinated, we can contain the coronavirus. Thursday, we're at just over 50% vaccinated. But 75% is no longer ...

DURHAM, N.C. -- Two of the COVID-19 vaccines currently in use in the United States will be effective against a variant of the virus that was first identified in California, according to researchers at ...

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 ...