Arizona officials confirm measles outbreak in Navajo County
officials in Arizona say there are four linked
measles
cases in Navajo County, marking the state's first outbreak this year.
The U.S. logged 122 more cases of measles last week - but only four of them in Texas - while the outbreaks in Pennsylvania and Michigan officially ended.
There were 1,168 confirmed measles cases in the U.S., the Centers for Disease Control and Prevention said Friday. Health officials in Texas, where the nation's biggest outbreak raged during the late winter and spring, said they'll now post case counts only once a week - yet another sign the outbreak is slowing.
There are three other major outbreaks in North America. The longest, in Ontario, Canada, has resulted in 2,009 cases from mid-October through June 3. The province logged its first death Thursday in a baby that got congenital measles but also had other preexisting conditions.
Another outbreak in Alberta, Canada, has sickened 761 as of Thursday. And the Mexican state of Chihuahua had 1,940 measles cases and four deaths as of Friday, 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 Colorado, Illinois, Kansas, Montana, New Mexico, North Dakota, Ohio and Oklahoma.
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.
How many measles cases are there in Texas? There were a total of 744 cases across 35 counties, most of them in West Texas, state health officials said Tuesday.
Throughout the outbreak, 96 people have been hospitalized.
State health officials estimated less than 1% of cases - fewer than 10 - are actively infectious. 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 411 cases since late January - just under 2% of the county's residents.
The April 3 death in Texas was an 8-year-old child, according to Health Secretary Robert F.
Kennedy
Jr. Local health officials said the child did not have underlying health conditions and died of "what the child's doctor described as measles pulmonary failure." A unvaccinated child with no underlying conditions died of measles in Texas in late February; Kennedy said the child was 6.
How many measles cases are there in New Mexico? New Mexico held steady Tuesday with a total of 81 cases.
Seven people have been hospitalized since the outbreak started. Most of the state's cases are in Lea County. Sandoval County near Albuquerque has six cases, Eddy County has three, Doña Ana County has two. Chaves, Curry and San Juan counties have one each.
An unvaccinated adult died of measles-related illness March 6. The person did not seek medical care.
How many cases are there in Oklahoma? Oklahoma added one case Tuesday for a total of 16 confirmed and three probable cases.
The
state health department
is not releasing which counties have cases.
How many cases are there in Arizona? Arizona has four cases in Navajo County. The cases are linked to a single source, the county health department said Monday. All four are unvaccinated and have a history of recent international travel.
How many cases are there in Colorado? Colorado has seen a total of 14 measles cases in 2025, which includes one outbreak of eight related cases.
The outbreak is linked to a Turkish Airlines flight that landed at Denver International Airport in mid-May, and includes four cases in Arapahoe County, three in El Paso County and one in Denver, plus a person who doesn't live in Colorado.
Other counties that have seen measles this year include Archuleta and Pueblo.
How many cases are there in Illinois? Illinois health officials confirmed a four-case outbreak on May 5 in the far southern part of the state, and it's grown to eight cases as of June 6, 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.
How many cases are there in Kansas? Kansas has a total of 71 cases across 11 counties in the southwestern part of the state, with three hospitalizations. All but two of the cases are connected, and most are in Gray County.
How many cases are there in Montana? Montana had 17 measles cases as of Thursday. Ten were in Gallatin County, which is where the first cases showed up - Montana's first in 35 years.
Flathead and Yellowstone counties had two cases each, and Hill County had three case.
There are outbreaks in neighboring North Dakota and the Canadian provinces of Alberta, British Columbia and Saskatchewan.
How many cases are there in North Dakota? North Dakota, which hadn't seen measles since 2011, was up to 34 cases as of Friday. Two of the people have been hospitalized, and all of the people with confirmed cases were not vaccinated.
There were 16 cases in Williams County in western North Dakota on the Montana border. On the eastern side of the state on the Minnesota border, there were 10 cases in Grand Forks County and seven cases in Cass County. Burke County, in northwest North Dakota on the border of Saskatchewan, Canada, had one case.
How many cases are there in Ohio? Ohio remained steady for a third week at 34 measles cases and one hospitalization, according to the Ohio Department of Health. That count includes only Ohio residents.
The state has two outbreaks: Ashtabula County near Cleveland has 16 cases, and Knox County in east-central Ohio has 20 - 14 among Ohio residents and the rest among visitors. Allen, Cuyahoga, Holmes and Defiance counties have one case each.
How many cases are there in Tennessee? Tennessee has had six measles cases since early May, but no change since. Tennessee's outbreak appears to be over, as health officials say there have not been any new cases in six weeks.
Where else is measles showing up in the U.S.? Measles cases also have been reported in Alaska, Arkansas, California, Florida, Georgia, Hawaii, Indiana, Iowa, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Missouri, Nebraska, New Jersey, New York, Pennsylvania, Rhode Island, South Dakota, Vermont, Virginia and Washington.
Earlier outbreaks in Indiana, Michigan and Pennsylvania were declared over by health officials after six weeks of no new cases.
Cases and outbreaks in the U.S. are frequently traced to someone who caught the disease abroad. The CDC said in May that more than twice as many measles have come from outside of the U.S. compared to May of last year, and most of those are in unvaccinated Americans returning home. In 2019, the U.S. saw 1,274 cases and almost lost its status of having eliminated measles.
What do you need to know about the
MMR
vaccine? The best way to avoid measles is to get the measles, mumps and rubella vaccine. The first shot is recommended for children between 12 and 15 months old and the second between 4 and 6 years old.
Getting another MMR shot as an adult is harmless if there are concerns about waning immunity, the CDC says. People who have documentation of receiving a live measles vaccine in the 1960s don't need to be revaccinated, but people who were immunized before 1968 with an ineffective vaccine made from "killed" virus should be revaccinated with at least one dose, the agency said.
People who have documentation that they had measles are immune, and those born before 1957 generally don't need the shots because so many children got measles back then that they have "presumptive immunity."
Measles has a harder time spreading through communities with high vaccination rates - above 95% - due to "herd immunity." But childhood vaccination rates have declined nationwide since the pandemic and more parents are claiming religious or personal conscience waivers to exempt their kids from required shots.
What are the symptoms of measles? Measles first infects the respiratory tract, then spreads throughout the body, causing a high fever, runny nose, cough, red, watery eyes and a rash.
The rash generally appears three to five days after the first symptoms, beginning as flat red spots on the face and then spreading downward to the neck, trunk, arms, legs and feet. When the rash appears, the fever may spike over 104 degrees Fahrenheit, according to the CDC.
Most kids will recover from measles, but infection can lead to dangerous complications such as pneumonia, blindness, brain swelling and death.
How can you treat measles? There's no specific treatment for measles, so doctors generally try to alleviate symptoms, prevent complications and keep patients comfortable.
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