What is the “delta plus” variant? It’s a relative of the delta variant, identified by British scientists last month. Because it isn’t a variant of interest or concern, it has not yet been officially ...

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 ...

CNN — A new and slightly changed version of the Delta coronavirus variant is spreading in a number of countries including the United Kingdom, United States and India, health officials say. This strain ...

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 ...

If more Americans don't get vaccinated, there is "ample chance" of another coronavirus variant emerging, one that could be more aggressive and more pervasive than the delta variant, Dr. Anthony Fauci ...

Several COVID-19 variants are acting uniquely enough to qualify as a distinct strain. And you might have heard about one on ...

KANSAS CITY, Mo. (AP) - As the U.S. emerges from the COVID-19 crisis, Missouri is becoming a cautionary tale for the rest of the country: It is seeing an alarming rise in cases because of a ...

With the Delta variant in play, federal health officials are analyzing the latest numbers to look at the frequency and seriousness of COVID-19 breakthrough infections. Will we need booster shots? And ...