CDC says measles cases are most likely underreported as outbreak swells in Texas

Measles cases are most likely being underreported in the United States as public health officials scramble to find resources to address a ballooning outbreak in the Southwest, according to a senior scientist at the Centers for Disease Control and Prevention.

So far this year, 747 cases have been recorded in the United States, according to NBC News’ tally. Two unvaccinated children in Texas and an unvaccinated adult in New Mexico have died. The adult tested positive for measles, but the official cause of death is still under investigation. 

Dr. David Sugerman, a senior scientist leading the CDC’s measles response, said Tuesday at a meeting of the CDC’s vaccine advisory committee that more than 90% of the cases are “related to the Southwest outbreak, driven by transmission in close-knit, undervaccinated communities.” The other cases have largely been imported from other countries, he said.

“We do believe that there’s quite a large amount of cases that are not reported and underreported,” Sugerman said Tuesday as he updated the committee on measles. “In working very closely with our colleagues in Texas; in talking with families, they may mention prior cases that have recovered and never received testing, other families that may have cases and never sought treatment.”

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Source: NBC News, 16 April 2025