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 ...

Since SARS-CoV-2 first emerged in late 2019 the virus has spawned dozens of lineages, a handful of global "variants of ...

PHILADELPHIA (WPVI) -- When comparing omicron vs. delta variants, omicron has 53% less risk of hospitalization and 91% less risk of death, CDC Director Dr. Rochelle Walensky revealed on Wednesday.

U.S. health officials are on high alert and looking for any cases of the new omicron variant. Questions are also being raised if this new variant will overtake delta. Dr. Otto Yang, a leading ...

More than half of the U.S. population has received at least one dose of the coronavirus vaccine. But based on a new scenario model by Johns Hopkins the next three months are crucial if we want to ...

As coronavirus vaccinations slow in the U.S., the contagious infectious delta variant is driving a rise in cases nationwide. The delta variant emerged in India and is currently widespread, according ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (NEXSTAR) – When the omicron variant emerged ...