Profile

A single spillover, from a bird to a cow, led to the infections, a review of genetic data has found.

Americans with Covid or other respiratory infections may return to daily activities if they don’t have a fever and their symptoms are improving.

The pandemic and recent wildfires have shown how unhealthy indoor air can be. But scientific and governmental inertia have slowed the necessary remedies.

A new antibiotic, zoliflodacin, is as effective as the current standard of care. Its creation may hasten the arrival of other needed antibiotics.

Citing questions about the integrity of the process, the university said that “no final action” had been taken.

A professor at the City College of New York engaged in “significant research misconduct,” an expert committee concluded.

Scientists and educators are searching for ways to improve air quality in the nation’s often dilapidated school buildings.

The “grade A” endorsement means that two additional drugs should be covered under the Affordable Care Act.

This fall, Americans will be urged to get shots against the flu, Covid and, if they’re older, R.S.V.

In advance of a scientific meeting on Thursday, officials proposed offering new shots to Americans each fall, a strategy long employed against the flu.