The Arctic can stay perpetually dark for months. Reindeer cope by changing part of their eyes from gold to blue.
For the first time, COVID vaccines are getting an update in the U.S. But Americans still need to be persuaded to take them.
If the virus finds a new animal host, it could settle in for the long run—and cause more outbreaks in the future.
Most frogs can jump and land with the precision and grace of an Olympic gymnast. And then there’s the pumpkin toadlet.
Monkeypox is very different from COVID—and will require a very different vaccination approach.
A string of negatives can still presage a clear-as-day positive.
COVID vaccines for infants and toddlers are stalling and stumbling even before they’ve left the gate.
Kids are at risk of severe COVID outcomes—and immunity from infection isn’t enough.
Why violence demands not just policy solutions, but public-health ones
Our original-recipe shots are holding up against new variants. But we may need to improve them, and soon.
Could humans be to blame?
Experts are expected to choose a vaccine recipe for the fall, when Omicron may or may not still be the globe’s dominant variant.
Early anecdotes about Paxlovid’s effects on long COVID are intriguing, but no one’s testing them in clinical trials yet.
Compared with what the U.S. saw in January, the current rise in cases so far looks pretty chill. Is it, though?
With time and effort, we can build enough protection to blunt surges—but herd immunity remains out of reach.
Breed doesn’t have that big an effect on a dog’s personality.
A lot has changed since last year’s pre-Delta lull, but America can still reclaim some coronavirus-free chill—if it decides to commit.
Months of confusing messaging, piled onto existing inequities, kneecapped America’s booster campaign before it had really started.
The elite rule with an iron fist—and a giant spleen.
The United States could be in for a double whammy: a surge it cares to neither measure nor respond to.