LAS VEGAS — The Southern Nevada Health District and the Nevada Division of Public and Behavioral Health (NDPBH) are reporting a confirmed case of measles in a visitor to Clark County. The individual attended ConExpo at the Las Vegas Convention Center in Las Vegas on March 6 and 7 and spent time in the Las Vegas area on March 8. The person was infectious throughout this time.
People who were at the Las Vegas Convention Center during this time, or who may have had contact with the infected individual, should review their immunization status and contact their health care providers if they are not fully vaccinated against measles or have not previously had the disease.
Measles is one of the most contagious infectious diseases, and up to nine out of 10 people who are not immune may become infected if they are exposed to the virus. The measles virus can remain in the air for up to two hours after an infected person has left the area.
Measles symptoms can develop within seven to 21 days after exposure. Anyone who may have been exposed should monitor for symptoms and contact their health care provider if they develop a rash with fever or other symptoms consistent with measles. People experiencing symptoms should avoid contact with others and call ahead before visiting a health care facility to allow staff to take precautions and prevent further exposure.
Measles can be a potentially serious disease. Symptoms include fever, cough, runny nose and red eyes. The characteristic rash typically appears one to four days after the early symptoms begin. Measles can spread from about four days before the rash appears until four days after.
Complications can occur in otherwise healthy people, those at higher risk for complications include children younger than 5, adults older than 20, pregnant women and people with weakened immune systems.
In 2025, one confirmed case of measles was reported in Clark County. The measles (MMR) vaccine is safe and highly effective, and two doses provide about 97% protection against measles. The Health District and NDPBH remind the public that staying up to date on recommended vaccinations is the best way to protect individuals, families and the community from outbreaks of vaccine-preventable diseases.
For more information about the vaccine, visit the Centers for Disease Control and Prevention’s website at www.cdc.gov/measles. To make an appointment for vaccination at a Southern Nevada Health District clinic, visit www.snhd.info/immunizations.