LAS VEGAS (FOX5) — The Southern Nevada Health District and the Nevada Division of Public and Behavioral Health (NDPBH) have confirmed a case of measles in a visitor to Clark County, prompting a public health alert for people who may have been exposed.
Officials said the individual attended ConExpo at the Las Vegas Convention Center on March 6 and 7 and spent time in the Las Vegas area on March 8.
The person was infectious during this entire period, they add.
Health officials are urging anyone who was at the convention center during those dates, or who believes they may have had contact with the visitor, to review their immunization status and contact a health care provider if they are not fully vaccinated against measles or have not previously had the disease.
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Symptoms can develop seven to 21 days after exposure.
Officials say anyone who may have been exposed should monitor for signs of illness and contact a provider if symptoms appear, especially a fever with rash. Symptoms include fever, cough, runny nose, and red eyes.
Measles can spread from about four days before the rash appears through four days after, with officials warning that those at high risk include children under 5, adults over 20, pregnant women, and people with weakened immune systems.
Clark County recorded one confirmed measles case in 2025, officials say.
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