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

COVID-19 cases of the omicron variant continue to increase across the country and in the Bay Area.

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.

A Los Angeles resident has tested positive for coronavirus for the second time in 2021 since he was vaccinated earlier this year. NBC 7’s Priya Sridhar reports.

Travis Dagenais says he tested positive for the delta variant of the Coronavirus in July after completing his two-shot Moderna vaccine in April. “There had been a lot of verbiage about mild cases, about very rare breakthrough cases, but at the time it was happening my personal and anecdotal reaction was less that these are very rare and these are…

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.

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

A doctor explained to NBC 7’s Jackie Crea how the omicron variant is different, and why it poses such a threat.

A virologist at UC San Diego told NBC 7 that the early reports of omicron infections are most likely not representative of the variant’s total behavior

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

COVID-19 deaths and cases in the U.S. have climbed to levels not seen seen since last winter, wiping out months of progress and potentially bolstering President Joe Biden’s argument for sweeping new vaccination requirements

An upstate New York hospital will stop delivering babies later this month, in part because of employee resignations over a requirement they be vaccinated against COVID-19

A new CDC study out Friday provides what may be the most jolting evidence yet of the threat the highly contagious delta variant may pose to the fully vaccinated, particularly as it usurped every other COVID-19 strain to dominate American cases.

Scottie B. Day, physician-in-chief at Kentucky Children’s Hospital, says that COVID-19 admissions are three times higher now than they were at the end of July and the majority of patients are unvaccinated. 

Six feet. Fifteen minutes. Those are the measuring sticks used in contact tracing to discover whether someone is at risk of catching COVID-19 from someone else. It’s a process doctors say isn’t easy.

The latest NBC News tally showed that the U.S. has recorded at least 40 million cases and over 651,000 deaths, as the fourth wave brought on by the delta variant continues to spread throughout the country.

This fourth wave of COVID cases was brought on by the Delta variant and it is overwhelming hospitals across the country.