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It would make more sense to screen a plane's wastewater to look for new variants than to screen individual passenger volunteers, some researchers say. Others say any information is helpful.

People can get the Moderna booster if they're 18 or older, and the Pfizer-BioNTech version if they're 12 and up. In both cases, they must wait at least two months since their last COVID vaccine.

The CDC said Americans 65 and older should get another dose of the updated vaccine that became available in September — if at least four months has passed since their last shot.

"Where is the fairness?" One mother was sent back after a single failed drug test, and her family's life has now been turned upside down for more than a year.

The world's top-ranked player Novak Djokovic won't play at the upcoming BNP Paribas Open at Indian Wells after losing his bid to enter the U.S. unvaccinated to play in the Southern California event.

Americans' life expectancy declined by nearly two years in 2020 compared to the year before, primarily because of COVID-19. The drop in life expectancy was bigger for men, and for Blacks and Latinos.

The FDA-authorized tests call for a nasal swab. Some doctors are tweeting that they're doing a throat swab too — though they don't recommend this step to the public. Here's a look at the swab debate.

Republicans believe COVID-19 policies largely backed by Democrats are causing a schism among parents of school-age children and that will help the GOP win elections this year up and down the ballot.

SARS-CoV-2 has been evolving the ability to evade the immune system about twice as fast as the fastest-evolving flu virus. It averages more than a dozen significant changes every year.

Stephanie was usually careful about her health and regular vaccinations. But then she got into sharing far-out videos and fringe ideas. When COVID hit, misinformation put her and her husband at risk.