# Measles outbreak in New York

> Live situation record from CLSTR: https://clstr.news/situations/measles-outbreak-in-new-york
> Updated: 2026-09-15T20:23:52.000Z. Sources: 11. Developments: 2.

Health officials in Western New York and neighboring areas initially issued warnings following a rise in measles cases. In Steuben County, four cases were confirmed, including infections among unvaccinated residents. Officials emphasized the high contagiousness of the virus and the importance of the measles, mumps, and rubella (MMR) vaccine.

By mid-September, the situation expanded statewide, with New York recording 57 confirmed cases. While six cases were reported in New York City, 51 occurred in other regions, including increased activity in the Capital, Central, and Western New York areas. To manage the spread, the state launched an online dashboard to provide weekly preliminary case updates. State Health Commissioner Dr. James McDonald reiterated the necessity of being up to date on vaccinations and provided guidance on quarantine and isolation protocols.

## Claims

- New York recorded 57 confirmed measles cases as of September 12, 2026. (corroborated by 3 sources)
- Of the 57 cases, six occurred in New York City and 51 occurred in the rest of the state. (corroborated by 3 sources)
- New York health officials launched an online dashboard to track measles cases weekly. (corroborated by 3 sources)
- Increased measles activity has been observed in the Capital, Central, and Western regions of New York. (corroborated by 3 sources)
- One dose of the MMR vaccine provides approximately 93 percent protection, while two doses provide about 97 percent protection. (corroborated by 3 sources)
- Health officials recommend a 21-day quarantine for exposed individuals and isolation for positive cases until four days after a rash appears. (single source)

## Timeline

### 2026-09-15: New York launches measles dashboard amid rise in statewide cases

New York health officials launched a measles dashboard following 57 confirmed cases in 2026, with increased activity reported in the Capital, Central, and Western regions of the state.

4 sources. https://clstr.news/cluster/new-york-launches-measles-dashboard-amid-rise-in-statewide-cases

### 2026-08-31: Health officials urge vaccination following measles cases in Western New York

Health officials in Western New York are urging vaccination following measles cases in Steuben and Chautauqua counties, involving unvaccinated residents.

7 sources. https://clstr.news/cluster/health-officials-urge-vaccination-following-measles-cases-in-western-new-york

---
Cite as: Measles outbreak in New York. CLSTR, https://clstr.news/situations/measles-outbreak-in-new-york