It's been less than a month since health officials reported the first known case of a new and more contagious coronavirus variant in Texas. The man, a Harris County resident, had no travel history.

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 ...

MEMPHIS, Tenn. (WREG) — The coronavirus continues to mutate with new strains that have proven even more transmissible than the first variant to spread across the globe. Doctors and public health ...

Covid-19 levels are about the lowest they’ve ever been in the United States, but another new crop of virus variants once again threatens to disrupt the downward trend as the country heads into summer.

The most recent dominant variants of SARS-CoV-2, the virus that causes COVID-19, are part of a group sometimes called “FLiRT” variants and serve as a reminder that the virus isn’t going away and some ...

Evidence is mounting that having COVID-19 may not protect against getting infected again with some of the new variants. People also can get second infections with earlier versions of the coronavirus ...

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

According to the World Health Organization, the "FLiRT" variants of the SARS-CoV-2 coronavirus have been the dominant forms of the virus circulating globally this year. "FLiRT" is an acronym for the ...

Four theories could explain the variants' ability to jump from person to person. In recent months, new variants of the virus that causes COVID-19 have been popping up all over the world, and experts ...

As evidence mounts that the omicron variant is less deadly than prior COVID-19 strains, one oft-cited explanation is that viruses always evolve to become less virulent over time. The problem, experts ...

Modern laboratory techniques for the detection of novel human viruses are greatly needed as physicians and epidemiologists increasingly deal with infectious diseases caused by new or previously ...

"As these viruses continue to evolve, public health officials watch carefully to see whether new strains will be more easily ...