With the Omicron variant of the coronavirus now dominant across the U.S., federal health officials are pleading with adults to wear masks and get a booster shot in hopes of curbing a feared surge ...

BA.5 is causing more reinfection in people who already had COVID-19, including earlier versions of omicron. It's also evading immunity from the vaccines. The vaccines are still effective at ...

Omicron’s reduced severity compared to previous variants, and the perceived likelihood that individuals will eventually be infected, have contributed to that relaxation in people’s mindsets ...

Several Omicron experts said the chaos might soon end. In August, a variant called BA.2.86 emerged with a host of new mutations — likely the result, once again, of evolution taking place in an ...

Editor’s Note: Dr. Tom Frieden, director of the CDC from 2009 to 2017, oversaw responses to the H1N1 influenza, Ebola and Zika epidemics. He is president and CEO of Resolve to Save Lives, an ...

It was then formally issued the label "Omicron." Early on in the pandemic the WHO acknowledged the need for a simple way to communicate emerging SARS-CoV-2 variants so it was decided new variants ...

Conventional wisdom says Omicron is less likely to cause serious illness, but that might be due to better immunity and treatments, not the virus itself. Omicron seen as milder coronavirus but ...

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 ...

The arrival of Omicron — with the first U.S. case detected in San Francisco on Wednesday and more in New York, Minnesota and Colorado a day later — is a reminder that Delta isn’t the endgame.

(NEXSTAR) – The omicron variant of COVID-19 has once again evolved, spawning new versions of itself with slight mutations that could make the virus more transmissible or more dangerous.