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What causes breakthrough measles infections?
NBC News Clone summarizes the latest on: Mmvo238074949645 - Breaking News | NBC News Clone. This article is rewritten and presented in a simplified tone for a better reader experience.
More than 800 people in the U.S. have had measles since the start of 2025, according to NBC News data. The majority of cases are in West Texas, where an outbreak that shows no signs of abating, began in January. NBC News medical contributor Dr. Kavita Patel explains why a small number of people who are fully vaccinated may get sick during a large outbreak.
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