When the first monkeypox cases were identified in early May, European health officials were stumped. The virus was not known to spread easily among people, let alone infect dozens — and soon hundreds — of young men. The origins of the outbreak are now becoming clearer. Genetic analysis suggests thatContinue Reading

Wading into an acrimonious debate over booster doses, researchers in Israel reported on Wednesday that a third dose of the Pfizer-BioNTech coronavirus vaccine can prevent both infections and severe illness in adults older than 60 for at least 12 days. The study, published in the New England Journal of Medicine,Continue Reading

Cats, so often, are a mystery, even to those that know them best. Why do they sleep so much? Why do they want your full attention one minute, none the next? How can they find their way back home after being stranded miles away for years? The writer Haruki Murakami,Continue Reading

If a newborn child grows up hearing people speaking in many different languages, will it later be able to speak all those languages? — Puneesh T., India Children learn languages from the people around them. If they are exposed to multiple languages, they may grow up bilingual or multilingual. TheseContinue Reading

Officials at the Centers for Disease Control and Prevention on Friday pushed back against the idea that the monkeypox virus can spread through the air, saying the virus is usually transmitted through direct physical contact with sores or contaminated materials from a patient. The virus may also be transmitted byContinue Reading

The Centers for Disease Control and Prevention updated its guidance last week for travelers wishing to protect themselves against monkeypox. This was one of its recommendations: “Wear a mask. Wearing a mask can help protect you from many diseases, including monkeypox.” Late Monday night, that recommendation was deleted. “C.D.C. removedContinue Reading

The Centers for Disease Control and Prevention has identified 21 monkeypox cases in 11 states, and the numbers are expected to rise, officials reported on Friday. Genetic analysis has revealed that while most of the cases appear to be closely related to the outbreak in Europe, two patients have versionsContinue Reading

It was three days before Christmas, and Elizabeth Widders was perched in her upstairs bathroom, fastening red and green bows in the hair of her 4-year-old daughter, Liviah. But as Liviah stood in the morning light, her mother noticed that the whites of her eyes had turned yellow. She hustledContinue Reading

Tests also differ in their sensitivity, and people differ in how they perform them. “Some people do a swab test and it’s like they barely touch their nose,” Dr. Gordon said. “Whereas with other individuals — actually, with a family member recently, I had to be like, ‘Don’t hurt yourself,’Continue Reading

Some voters think the list could make a difference in the elections. “Most of the scientific community is definitely antiwar,” said Alexander Nozik, a physicist at the Moscow Institute of Physics and Technology who was not involved in creating the list. “Being in such a list could significantly reduce chancesContinue Reading