With fall, and by extension, respiratory illness season, underway, COVID-19 cases have continued to fluctuate nationwide. Some regions of the United States are experiencing "very high" and "high" ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. COVID-19 viral activity was high in the United States during the first week of September, according to fresh data from the Centers ...

NEW YORK (WABC) -- The FDA is reviewing data on Pfizer's vaccine for children ages five to 11. One federal official told ABC News those shots could begin rolling out before Thanksgiving, a few weeks ...

Several illnesses - including COVID-19 - are currently circulating statewide.

Children and adolescents had higher risks of vascular and inflammatory diseases after a first COVID diagnosis, as well as a higher risk of rare myocarditis or pericarditis after a first COVID vaccine.

The effectiveness of last season's COVID vaccines among immunocompetent adults reached 40% against hospitalization and 79% ...

COVID-19 viral activity was high in the United States during the first week of September, according to fresh data from the Centers for Disease Control and Prevention. Some regions of the United States ...