What's the U.S. doing to watch out for the omicron variant? Here's the work underway and the challenges that experts say may slow down the country's efforts.

Among the policies being considered is a requirement that all air travelers to the U.S. be tested for COVID-19 within a day of boarding their flight.

The FDA isn’t bound by the panel’s recommendation and is expected to make its own decision before the end of the year.

Pennsylvania’s school mask mandate was set to expire on Saturday. Now, the state Supreme Court said the mandate can stay in place while a lawsuit plays out.

The more COVID-19 spreads among unvaccinated populations, the more possibilities it has to mutate and potentially become more dangerous, prolonging the pandemic for everyone.

The FDA is considering pills that could treat people in early stages of COVID. Here's what to know about how they work, how effective they are and the impact they could make.

The preliminary injunction applies to a coalition of suing states that includes Alaska, Arkansas, Iowa, Kansas, Missouri, Nebraska, New Hampshire, North Dakota, South Dakota.

Health officials said the Garden State’s public and commercial labs are sequencing around 1,200 specimens a week, on the lookout for changes to the coronavirus.

A leading scientist at the Penn lab that detected the first cases of delta says omicron will inevitably arrive here. He says the question is, “how much does it matter?"

Long COVID has been a reality since the beginning of the pandemic. The patients who have it are desperate for answers that doctors don't yet have.

The newly identified strain of the coronavirus, which could be more transmissible than the previously dominant Delta variant, has global health officials worried.

Public health experts warn that the rush to impose travel bans on southern African countries after the omicron variant was identified can work against scientific transparency.

Doctors in the Delaware Valley are pleasantly surprised. An October survey had shown many parents against or hesitant about vaccination.

The new potentially more contagious omicron variant of the coronavirus has popped up in more European countries, just days after being identified in South Africa.

In a statement on Friday, the World Health Organization designated it as a “variant of concern."