We Are in a Big Covid Wave. But Just How Big? Wastewater data has become perhaps the best metric to track the spread of the virus in the U.S., but it’s an imperfect tool.
Is Biological Age Testing Accurate or Useful? New tests promise to tell you if you have the cells of a 30-year-old or a 60-year-old. Here’s what to know about them.
Mystery Amid an Anthrax Outbreak in Africa Only a fraction of the presumed cases in five countries have led to positive tests for anthrax. Some scientists say other causes cannot yet be ruled out.
U.S. Offers Another Round of Free Covid Tests Through the Mail Households may now order another four at-home tests, or eight if they have not placed an order since the program was revived in September.
Infants Are Born With Syphilis in Growing Numbers, a Sign of a Wider Epidemic Congenital syphilis has become more than ten times as common over the past decade, the C.D.C. reported. “The situation is dire,” said one expert.