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Measles Outbreak in Colorado: 7 Cases Linked to Unvaccinated

10/8/2025

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Summary

Story summary

In August 2025, Mesa County, Colorado, reported two local measles cases from unknown sources, triggering outbreak concerns.
Wastewater surveillance detected the virus early, enabling public health officials to prepare and respond.
The outbreak grew to seven cases, with 70% unvaccinated or unknown status, as public health officials conducted extensive contact tracing and no new cases have been reported since.

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Story summary

In August 2025, Mesa County, Colorado, reported two local measles cases from unknown sources, triggering outbreak concerns.
Wastewater surveillance detected the virus early, enabling public health officials to prepare and respond.
The outbreak grew to seven cases, with 70% unvaccinated or unknown status, as public health officials conducted extensive contact tracing and no new cases have been reported since.