This Fjord Shows Even Small Populations Create Giant Microfiber Pollution

Researchers found that one tiny Arctic village’s unfiltered sewage produces as much microplastic as the treated waste of more than a million people.

Does My Mask Protect Me if Nobody Else Is Wearing One?

Masks work best when everyone in the room has one on, but you’ll still benefit from masking up even when those around you aren’t.

Does My Mask Protect Me if Nobody Else Is Wearing One?

Masks work best when everyone in the room has one on, but you’ll still benefit from masking up even when those around you aren’t.

Dry Eyes Afflict Many of Us. Here’s What to Do About It.

That gritty, itchy feeling in your eyes can arise from many causes, including too much screen time, and eye drops may only make it worse.

Barred from flying, an Alaska lawmaker who rejects ‘mask tyranny’ asks to be excused from the State Senate.

Lora Reinbold, a Republican state senator, was captured on video in April arguing with employees at Juneau International Airport about mask rules.

Opinion | Republicans Have Gone Too Far in the Region Hit Hardest by Covid

Mask mandates protect children only when masking is universal. This is not a hard concept to understand.

Those Anti-Covid Plastic Barriers Probably Don’t Help and May Make Things Worse

Clear barriers have sprung up at restaurants, nail salons and school classrooms, but most of the time, they do little to stop the spread of the coronavirus.

Those Anti-Covid Plastic Barriers Probably Don’t Help and May Make Things Worse

Clear barriers have sprung up at restaurants, nail salons and school classrooms, but most of the time, they do little to stop the spread of the coronavirus.

Should I Mask? Can I Travel? What About Hugs? How Delta Is Changing Advice for the Vaccinated

The rise of the Delta variant of the coronavirus has raised new questions about how the vaccinated can stay safe and avoid breakthrough infections. We asked the experts for advice.

Should Vaccinated People Start Wearing Masks Again?

With daily reports of breakthrough infections and the rise of the Delta variant, vaccinated people may need to take a few more precautions. Here’s what you need to know.

C.D.C. Director Warns of a ‘Pandemic of the Unvaccinated’

Cases, hospitalizations and deaths remain far below last winter’s peak, but the director urged people to get fully vaccinated.

Vaccinated and Confused? Answers About Masks, the Delta Variant and Breakthrough Infections

Vaccines protect against the variants, but conflicting advice from health authorities about masks has bewildered a worried public.

Health Care Workers Deserve Fashion, Too

After masks, medical scrubs get the designer treatment. It’s the next big market no one expected.

Answers to All Your Burning Questions About Sunscreen

How effective is it? What SPF is best? Is it safe to wear every day?