CDC weekly update: 4,588 confirmed measles cases in 2026

CDC's Oct 23 update (data through Oct 22) reports 4,588 confirmed 2026 cases, up 178 (4.0%) in a week and roughly double the 2,289 cases in all of 2025. 47 jurisdictions have reported cases; 43 outbreaks in 2026 (one added), 96% of cases outbreak-associated (4,404); 479 hospitalizations (10%); CDC lists 3 federal-tally deaths, subject to review.