The United States is experiencing its largest measles resurgence in 35 years, with outbreaks across multiple states and falling vaccination rates.
At least 2,500 cases and two deaths have been recorded in 2026, exceeding the 2025 case total and putting the country's elimination status at risk.
Pulse measures how actively a story is being covered right now.
Every article counts as a vote whose weight fades over time — an article published today counts as 1.0, one from two days ago counts 0.5, four days ago 0.25, and so on (a 2-day half-life). Pulse is the sum of those weights, so fresh coverage lifts it and old bursts fade away smoothly.