The spread of the coronavirus accelerated sharply in U.S. counties where large universities held classes in person last fall, federal health researchers reported on...
The versions of the coronavirus that all seven carried were virtually identical genetically — strongly suggesting that one person among them initiated the outbreak....
My wife’s parents have led a relatively monastic existence since about mid-March.Both are in their 80s and live independently in rural Pennsylvania, maintaining a...
After Sandra Lindsay became the first person in the United States to receive a Covid-19 vaccination outside a clinical trial, something unexpected happened: She...
It will be difficult “to find and diagnose them within that vanishingly small window,” said Dr. Ilan Schwartz, an infectious disease physician at the...