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Scientists are starting to get insights into the lingering disorder that affects some people infected with SARS-CoV-2 — but many mysteries remain unsolved.
At a pivotal moment in the pandemic, Nature explores key questions about the vaccines that countries are racing to deliver while viral variants spread around the globe.
Archaeological finds suggest that people developed numbers tens of thousands of years ago. Scholars are now exploring the first detailed hypotheses about this life-changing invention.
With COVID rates dropping and vaccinations on the rise, the United States and other places are removing some requirements for face coverings. Are they moving too fast?
The pandemic is teaching us key lessons about crisis, communication and misinformation, and is spurring changes in the way scientists study public-health questions.
A class of drugs that silence the effects of faulty genes could help tackle brain diseases — but a halted clinical trial has brought the field up short.