The drugmaker said it would spend up to $4 billion to acquire small companies exploring vaccines for shingles, Epstein-Barr virus and other pathogens.
While global warming is still a threat, the decision to back away from a worst-case outlook raises questions about whether some risks have been overstated.
Lenacapavir, which protects people from H.I.V. infection with twice-yearly shots, is arriving in a country where the health system has been hollowed out by American aid cuts.
On Aug. 12, parts of Greenland, Iceland, Spain and Portugal will experience the thrill of daytime darkness. Here’s where you can witness the cosmic spectacle.
Evacuation orders remained in place for more than 40,000 residents around Garden Grove, Calif., the location of an industrial site containing an unstable tank of toxic chemical.