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 ...

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.

We all watched the news: a new variant of the SARS-CoV-2 virus was found in India in October 2020, sparking a devastating second wave with more than 400,000 daily infections. This mutation called ...

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 ...

A headline is fueling concern about Johnson and Johnson's one-shot vaccine, and whether it's less effective against the Delta variant. But experts point out the new study, out of NYU's school of ...

In a recent study published in Cell, researchers described their self-designed chimeric receptor-binding domain (RBD)-dimer vaccine approach to adapt severe acute respiratory syndrome coronavirus 2 ...

The Pfizer/BioNTech COVID-19 vaccine provided less protection against the omicron variant than the delta strain in children but did protect against severe illness from both variants, according to a ...

New research released by the CDC Friday offers perhaps the sharpest perspective yet on three critical questions that have emerged around the COVID pandemic over the last few months. How did the delta ...

India confirmed about 50,000 new coronavirus infections today. That is a fraction of what it was seeing at its peak last month. So it looks like the world's biggest and deadliest COVID-19 wave may now ...