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Measles Cases Surge: U.S. Faces Outbreaks, Vaccine Decline

1/5/2026

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Summary

Story summary

In 2025, the United States reported 2,065 measles cases, the highest since 1992, according to the Centers for Disease Control and Prevention.
Most cases stemmed from 50 outbreaks, primarily among unvaccinated individuals.
The MMR vaccine provides 97% protection.
Vaccination rates declined to 92.5% for kindergarteners in the 2024-2025 school year.
Health officials warn that the United States risks losing measles-free status as outbreaks continue, in South Carolina and along the Arizona-Utah border.

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Story summary

In 2025, the United States reported 2,065 measles cases, the highest since 1992, according to the Centers for Disease Control and Prevention.
Most cases stemmed from 50 outbreaks, primarily among unvaccinated individuals.
The MMR vaccine provides 97% protection.
Vaccination rates declined to 92.5% for kindergarteners in the 2024-2025 school year.
Health officials warn that the United States risks losing measles-free status as outbreaks continue, in South Carolina and along the Arizona-Utah border.