# Measles & vaccine-preventable — WATCH (worsening)
id measles · Global Health · horizon acute · checked 2026-11-01T11:52Z · at this level since 2026-10-31T11:26Z · stale after 2026-11-02T23:52Z
Assessed by an AI model (Anthropic Claude) against published rubrics; not a forecast or advice · CC BY 4.0 · https://canary.danleech.com/s/measles

Value: US 4,852 cases (29 Oct)
Rated on: Large outbreaks in high-income countries, or loss of elimination status.

US measles cases at 4,852 in 2026, the most since elimination

Why it's at this level: The CDC reported 4,852 confirmed US measles cases as of 29 Oct, more than double 2025's total, with three deaths. Analysts say the US is highly likely to lose its measles elimination status this autumn (CIDRAP).

What this means for you: Check that you and your children are up to date with MMR vaccination, especially before travel.

Why it matters: Falling vaccination rates are bringing back diseases once eliminated; measles is the canary for the rest.
What moves it: Vaccine coverage, misinformation, health-system disruption.

Rubric — Alert: Multi-country surge with rising deaths, or polio/diphtheria resurgence in high-income countries. | Watch: Large outbreaks in high-income countries, or loss of elimination status. | Normal: No large outbreaks in high-income countries.

Sources:
- Contagion Live — Measles update, 30 Oct (2026-10-30) https://contagionlive.com/view/measles-update-october-30-2026
- CIDRAP — US highly likely to lose measles elimination status (2026-10-01) https://www.cidrap.umn.edu/measles/us-highly-likely-lose-measles-elimination-status-fall-analysis-warns