Delta variant

It’s been called “stealth omicron” or “deltacron.” A new subvariant of the COVID-19 virus is making headlines, so we talked to NBC News medical correspondent Dr. John Torres to learn more. He explained how the variant “plagiarizes” from the Omicron and Delta variants that previously caused surges, and why this may not cause a new surge here in the...

A new study that compares coronavirus protection from prior infection and vaccination concludes getting the shots is still the safest way to prevent COVID-19

Doctors treating patients inside the COVID wards say they’re noticing one major difference between the omicron variant and the delta variant. During this surge, they say they’re seeing fewer cases of COVID pneumonia. They believe that the omicron variant isn’t able to replicate in the lung as well as delta, which is why most illnesses aren’t as...

The head of the World Health Organization says he’s worried about the omicron and delta variants of COVID-19 producing a “tsunami” of cases between them.

As schools brace for the rapid rise in omicron cases amid delta’s continued onslaught and the onset of flu season, some are closing their doors once again and moving back to online learning ahead of the holiday break.

Dr. Anthony Fauci said Wednesday that new data show booster shots of COVID-19 vaccines offer protection against the omicron variant and there is no current need to reformulate shots for variant-specific boosters.

Epidemiologists all over the country, including Texas, are interpreting the latest data from South Africa on the omicron variant. Four new studies are out and they indicate that omicron is more contagious than the delta variant. UT School of Health’s Dr. Katelyn Jetelina also says they’ll be watching for how quickly it spreads locally.

U.S. health officials say that while the omicron variant of the coronavirus is rapidly spreading in the country, early indications suggest it may be less dangerous than delta, which continues to drive a surge of hospitalizations

Health experts say this winter could bring a potential twindemic with rising cases of COVID-19 and very serious influenza is likely on its way.

The U.S. death toll from COVID-19 has surpassed 700,000.

The delta variant is causing a surge in infections among kids in the U.S. and elsewhere, but experts say there are no strong signs yet that it is causing more severe disease for young patients

Is the worst of the COVID-19 pandemic over? New models show the delta surge seems to be peaking and case numbers are on track to dip between now and spring. Bianca Castro reports.

Is the worst of the COVID-19 pandemic over? New models show the delta surge seems to be peaking and case numbers are on track to dip between now and spring.