The number of confirmed measles cases in New Mexico increased to six after the state’s Department of Health confirmed Wednesday a new case inside a local jail in Las Cruces.

A federal inmate being held in the Doña Ana County Detention Center is the latest person to have tested positive for measles. The New Mexico Department of Health said others may have been exposed to the highly contagious disease from this confirmed case if they visited the U.S. District Court building in Las Cruces on Feb. 24.

State heath officials are now urging anyone who was at the courthouse that day to check their vaccination status and report any measles symptoms from now until March 17 to a health care provider.

“The New Mexico Department of Health continues to urge people to get the measles, mumps and rubella (MMR) vaccination,” Dr. Chad Smelser, New Mexico’s deputy state epidemiologist, said in a statement. “Vaccine is the best tool to protect you from measles.”

Measles spreads through the air and people who contract the virus may experience symptoms such as runny nose, fever, cough, red eyes and a distinctive blotchy rash. These symptoms can develop between one and three weeks after exposure.

All of the six confirmed measles cases in New Mexico so far are federal detainees.

The first measles case was detected in the Hidalgo County Detention Center on Feb. 25, when a detainee, whose vaccination status was unknown, tested positive for the disease by the New Mexico Department of Health’s Scientific Laboratory.

Two days later, a second federal inmate in the same jail tested positive for the virus alongside two detainees in the Luna County Detention Center and another in the Doña Ana County Detention Center.

Both the Luna County and Doña Ana detention centers are local jails that also serve as holding facilities for federal immigration enforcement.

New Mexico health officials said they are the state’s first confirmed cases of this year, following a statewide outbreak in 2025 that sickened 100 people from mid-February to mid-September.

With two measles cases reported on each of the three local jails, Smelser said that the New Mexico Department of Health has sent vaccination teams to all three facilities.

State health officials are also “coordinating with all the facilities to assure all quarantine, isolation, testing and vaccination protocols are followed to minimize risk of measles spread.”

According to the NBC News measles tracker, more than 1,000 cases have been counted nationwide just in the first two months of this year. That’s nearly half the amount of cases confirmed in the United States in all of last year.

As 2026 already stands as one of the three worst years for measles infections in the country since 2000, another measles outbreak was confirmed this week in Texas inside the nation’s largest immigration detention facility.

On Wednesday, an Immigration and Customs Enforcement spokesperson told NBC News that a least 14 cases of measles were confirmed inside Camp East Montana, which is located on the Fort Bliss Army base in El Paso.

The people who tested positive for measles have been “cohorted and separated from the rest of the detained population to prevent further spread,” the ICE spokesperson said.