A new variant of the virus that causes COVID-19 is spreading in the U.S., raising concerns about a potential wave of ...

Add Yahoo as a preferred source to see more of our stories on Google. (NewsNation) — While COVID-19 isn’t the deadly and dangerous virus it was five years ago, it has still found a way to poke its ...

SAN FRANCISCO (KGO) -- There are multiple COVID-19 variants circulating the Bay Area, making it harder for this pandemic to be under control. ABC7 News reporter Luz Pena got an exclusive look at a ...

A new COVID-19 variant called "Stratus" has been circulating in Oklahoma, and the state's positive test rate has been higher than the national average during the summer months. Stratus is the ...

New COVID-19 variant XFG has firmly positioned itself as the predominant strain in the United States as cases continue to crop up nationwide. Some regions of the U.S. are experiencing higher rates of ...

Mark Cameron was part of the rapid-response research team when the SARS (Severe Acute Respiratory Syndrome) outbreak hit Toronto in the early 2000s. Now a faculty member in Population and Quantitative ...

NEW YORK -- What are the symptoms of omicron? Health experts still don't know if the new variant is causing milder COVID-19, but more indicators are emerging. The World Health Organization's top ...

How are experts tracking variants of the coronavirus? Scientists are scanning virus samples taken from infected people to look for mutations, through a process called genome sequencing. It’s the same ...

Covid-19 was never just another cold. We knew it was going to stick around and keep changing to try to get the upper hand on our immune systems. But we've changed, too. Our B cells and T cells, ...

Share on Pinterest Experts say variants of the virus that causes COVID-19 replicate quicker in people who are not vaccinated. David McNew/Getty Images Experts say the number of unvaccinated people in ...

COVID-19 cases continue to climb week-over-week as summer draws to a close, according to U.S. health data. Some regions of the United States are experiencing higher rates of positive COVID-19 tests ...