The Southern Nevada Health District recently detected the measles virus in Clark County’s wastewater. Although there are no confirmed measles cases in the county since 2018, this finding suggests the possibility of undiagnosed viral infections. The health district emphasizes the importance of ensuring children are up to date on their measles-mumps-rubella (MMR) vaccines, which are highly effective in preventing measles.
Cassius Lockett, the district health officer, noted that while a single detection in wastewater doesn’t confirm active cases or community transmission, it should still be taken seriously. A follow-up wastewater sample tested negative, but vigilance remains essential.
Brian Labus, an infectious disease expert from UNLV, explained that the presence of the virus in wastewater indicates someone in the community is shedding the virus. This individual might have contracted measles elsewhere and is near the end of their recovery. The announcement serves as a reminder for the medical community to be alert and prepared to respond swiftly to any real cases.
Measles, a highly contagious disease, poses serious risks, especially to young children. Although the World Health Organization declared measles eliminated in the U.S. in 2000, declining vaccination rates have led to outbreaks, such as one in early 2025 in west Texas. The health district stresses that MMR vaccination is required for school enrollment, with vaccines available ahead of the school year starting on Monday.
Labus advises that children should be fully immunized before attending school, as vaccination remains the most effective protection against measles.