The fast-spreading BA.5 subvariant of Omicron and its close relative BA.4 now make up around 95% of COVID-19 cases in the U.S., according to estimates published Tuesday by the Centers for Disease ...

People across at least 10 states have now been infected by BA.2.86, a highly mutated variant of the virus that causes COVID-19 that authorities have been closely tracking. According to data tallied ...

The subvariant of Omicron is becoming more common in the United States but probably won’t cause another large spike. By Carl Zimmer As the Omicron coronavirus surge subsides, researchers are keeping ...

The highly transmissible Omicron variant now accounts for half of the world's infections. But Omicron is an umbrella term for several closely related lineages of the SARS-CoV-2 coronavirus, the most ...

Even as SARS-CoV-2 gets better at spreading and evading some of the immune protection that people have built through infections or vaccination, new variants inevitably arise. That’s been the case with ...

A new version of omicron is dominant in the U.S. The coronavirus subvariant known as BA.5 accounted for nearly 54% of the country's Covid cases as of Saturday, according to the Centers for Disease ...

For much of the pandemic, the only silver lining to coming down with a case of COVID-19 was that you likely wouldn't catch it again for a while (though there isn't exactly a definitive answer on how ...