The most useful thing about a new HIV-prevention guide may be a question it never asks: Why do you want to know about pre-exposure prophylaxis, or PrEP?

When fire tore through Los Angeles County in January 2025, westerly winds blew most of the smoke and ash over the Pacific, keeping the main measure of air quality, total mass of particles smaller than 2.5 microns, at or near normal levels.

Fewer than one in five adults older than 65 report discussing their cannabis use with clinicians, according to Rutgers Health researchers. 

Frequent exposure to real-world firearm violence through media is associated with worse mental health outcomes, according to Rutgers researchers.