LAS VEGAS — Health authorities in Southern Nevada have confirmed a case of measles in a visitor to Clark County. This individual attended the ConExpo event at the Las Vegas Convention Center on March 6 and 7 and was in the area the following day, March 8, while being contagious.
Anyone who was present at the Las Vegas Convention Center during these dates, or who might have interacted with the infected person, is advised to check their vaccination status. It’s important to reach out to healthcare providers if there is any doubt about being fully vaccinated against measles or if there’s a history of the disease.
Measles is known for being extremely contagious. If someone who is not immune is exposed to the virus, there’s up to a 90% chance they will get infected. Notably, the measles virus can linger in the air for as much as two hours after the infected individual has left the space.
Symptoms typically manifest between seven to 21 days post-exposure. Individuals who believe they may have been exposed should keep an eye out for symptoms, such as a rash accompanied by a fever. It’s wise for those developing symptoms to avoid close contact with others. Also, calling ahead before visiting a healthcare facility is recommended so that staff can take the necessary precautions to minimize any further exposure.
Measles can lead to serious health issues. Common symptoms include fever, cough, runny nose, and red eyes. The notable rash usually appears one to four days after initial symptoms. Once the rash develops, the virus can be transmitted from about four days prior to that point until four days afterward.
Some individuals are at greater risk for complications from measles, including children under five, adults over 20, pregnant women, and those with weakened immune systems, even if they are generally healthy.
There was only one confirmed measles case in Clark County in 2025. The measles vaccine (MMR) is regarded as safe and highly effective, offering about 97% protection with two doses. Health officials emphasize the importance of staying current on vaccinations to safeguard not just individuals and families, but also the broader community from vaccine-preventable diseases.
For more details about the vaccine, the Centers for Disease Control and Prevention offers information on their website. Those interested in getting vaccinated can schedule an appointment at a Southern Nevada Health District clinic through their online platform.
