Kentucky has its first measles outbreak of 2025, as the U.S. case count sits just short of a 30-year high.

There have been 1,267 confirmed measles cases this year, the Centers for Disease Control and Prevention said Wednesday. Texas confirmed three more measles cases this week tied to a major outbreak that raged through the late winter and spring.

There are three other large outbreaks in North America. The longest, in Ontario, Canada, has resulted in 2,212 cases from mid-October through June 24. The province logged its first death June 5 in a baby who got congenital measles but also had other preexisting conditions.

Another outbreak in Alberta, Canada, has sickened 1,169 as of Wednesday. And the Mexican state of Chihuahua had 2,810 measles cases and eight deaths as of Wednesday, according to data from the state health ministry.

Other U.S. states with active outbreaks — which the CDC defines as three or more related cases — include Arizona, Colorado, Georgia, Illinois, Iowa, Kansas, Michigan, Montana, New Mexico, North Dakota, Oklahoma and Utah.

In the U.S., two elementary school-aged children in the epicenter in West Texas and an adult in New Mexico have died of measles this year. All were unvaccinated.

Measles is caused by a highly contagious virus that’s airborne and spreads easily when an infected person breathes, sneezes or coughs. It is preventable through vaccines and has been considered eliminated from the U.S. since 2000.

Texas

Texas added three outbreak-related cases Tuesday, for a total of 753 across 36 counties, most of them in West Texas, state data shows.

Throughout the outbreak, 99 people have been hospitalized.

State health officials estimated less than 1% of cases — fewer than 10 — were actively infectious as of Tuesday.

Fifty-five percent of Texas’ cases are in Gaines County, where the virus started spreading in a close-knit, undervaccinated Mennonite community. The county has had 414 cases since late January — just under 2% of its residents. Statewide, officials said Tuesday only two counties — Gaines and Lamar — had ongoing measles transmission.

The state also said Tuesday there are 37 cases across 19 counties that don’t have a clear link to the outbreak now, but may end up added to it after further investigation.

New Mexico

New Mexico had 94 measles cases Friday. Five cases were confirmed last week in a jail in Luna County, which prompted health officials to urge locals to get vaccinated and halted in-person visits. The jail’s outbreak grew to 13 by Tuesday. All cases are in unvaccinated adults.

Seven people have been hospitalized since the state’s outbreak started. Most of the state’s cases are in Lea County.

An unvaccinated adult died of measles-related illness March 6. The person did not seek medical care.

Oklahoma?

Oklahoma held steady Tuesday for a total of 17 confirmed and three probable cases.

The state health department is not releasing which counties have cases.

Arizona?

Arizona has four cases in Navajo County. They are linked to a single source, the county health department said June 9. All four were unvaccinated and had a history of recent international travel.

Colorado

Colorado has seen a total of 16 measles cases in 2025, which includes one outbreak of 10 related cases.

The outbreak is linked to a Turkish Airlines flight that landed at Denver International Airport in mid-May. Four people were on the flight with the first person diagnosed — an out-of-state traveler not included in the state count — while five got measles from exposure in the airport and one elsewhere.

Health officials are also tracking an unrelated case in a Boulder County resident. The person was fully vaccinated but had “recently traveled to Europe, where there are a large number of measles cases,” the state health department said.

Other counties that have seen measles this year include Archuleta and Pueblo.

Georgia

Georgia has an outbreak of three cases in metro Atlanta, with the most recent infection confirmed June 18.

The state has confirmed six total cases in 2025. The remaining three are part of an unrelated outbreak from January.

Illinois

Illinois health officials confirmed a four-case outbreak on May 5 in the far southern part of the state. It grew to eight cases as of June 6, but no new cases were reported in the following weeks, according to the Illinois Department of Public Health.

The state’s other two cases so far this year were in Cook County, and are unrelated to the southern Illinois outbreak.

Iowa

Iowa has had six total measles cases in 2025.

Four are part of an outbreak in eastern Johnson County, among members of the same household. County health officials said the people are isolating at home, so they don’t expect additional spread.

Kansas

Kansas added three more case this week for a total of 83 across 11 counties in the southwestern part of the state, with three hospitalizations. All but three cases are connected, and most are in Gray County.

Kentucky

Central Kentucky has an outbreak of four cases, the state announced Monday. The cases are in Fayette County, which includes Lexington, and neighboring Woodford County.

The state has confirmed seven total cases so far this year.