Medicine and public health, explained with the evidence. Informational only, not medical advice.
Measles has returned to countries that once eliminated it, driven by gaps in vaccination. The US has confirmed more than 5,000 cases in 2026, and regional health experts are reviewing its elimination status this week.
GLP-1 medicines such as semaglutide and tirzepatide are now approved in the US to cut heart, kidney and liver risks and to treat sleep apnoea. Not every hope has held up: a large Alzheimer's trial failed in 2025.
Most adults need at least seven hours of sleep a night, and the main expert ranges are seven to nine hours, or seven to eight after 65. A 2026 review of a decade of research left those ranges unchanged.
