Health & Science

In small studies in South Africa and Germany, the results indicate a marked decrease in the ability of vaccines to neutralize this variant.

New cases in the U.S. climbed from an average of nearly 95,000 a day on Nov. 22 to almost 119,000 a day this week, and hospitalizations are up 25% from a month ago.

Pfizer and its partner BioNTech said lab tests showed a booster dose increased by 25-fold the level of so-called neutralizing antibodies against omicron.

Diagnoses in people who inject drugs were rising before the pandemic. Health officials worry now about spread among people who don’t know their HIV status.

The latest surge has led Gov. Carney to schedule his first coronavirus briefing in more than two months for this afternoon.

Troopers stood guard at entrances around the statehouse complex, including little-used doorways where no state police presence is typically present.

Can the latest competitor to the world-dominating delta overthrow it?

The rapid emergence of the omicron variant of COVID-19 has many questioning whether they should rethink their holiday travel plans.

A new poll finds that the stresses of the coronavirus pandemic have been especially hard for younger Americans, particularly when it comes to their education and social lives.

There's a lot we don't know about the new COVID variant. Many people are wondering if they can fly and go to holiday parties and restaurants — or should just hide out.

With omicron on everyone’s minds, people are concerned about breakthrough infections. How do you proceed if you think you’ve had one?

An NPR analysis shows that since the vaccine rollout, counties that voted heavily for Trump have had more than twice the COVID mortality rates of those that voted for Biden.

The Philadelphia Union will be without 11 players on Sunday when the team plays NYCFC in the MLS Eastern Conference finals because of COVID-19 health and safety protocols.

New York has announced three more cases of the omicron variant of the coronavirus, bringing to eight the number of state cases linked to the new variant.