DENVER — Four more measles cases were identified in the Denver metro area, the Colorado Department of Public Health and Environment (CDPHE) announced Friday morning.
The CDPHE and Weld County Health Department identified the disease in three unvaccinated Adams County residents and one unvaccinated Weld County resident, the CDPHE said.
All four are tied to Broomfield High School and Broomfield Heights Middle School.
Eighty students and staff were instructed this week to stay home from school amid the state's first measles outbreak of 2026.
- Denver7 has been closely following confirmed measles cases in Colorado amid a multi-state outbreak in the U.S. that began last year. Explore the map by clicking here or check it out below to see where cases have popped up in 2026:
The CDPHE and Weld County Health Department are working with school administrators to notify students and staff who may need to take additional health precautions.
Measles is a highly contagious disease, the CDPHE warned Friday. Symptoms begin with a fever, cough, runny nose and red eyes. It's usually followed by a rash several days later that starts on a patient's face before spreading.
Anyone who has not had the measles, mumps and rubella (MMR vaccine can still get it within 72 hours of exposure to help prevent the illness. In some cases, some people can get immunoglobulin within six days to prevent or lessen illness.
CDPHE has added to the list of places people could have been exposed to measles from this latest four cases:
Anyone who visited one of these locations at the listed dates and times is asked to watch for measles symptoms for 21 days. If you develop symptoms, call CDPHE at 720-653-3369 or contact your local public health agency found here immediately.
As of Friday, Colorado has reported cases of the virus in Adams (5), Arapahoe (1) and Broomfield (1), and Weld counties. On average, the state sees between zero and two cases each year. Last year, Colorado reported 36 measles cases amid a multi-state outbreak of the virus in the U.S.
Across the country, the number of confirmed measles infections has already topped 1,000. For context, 2026 has already seen more than half of all measles cases in more than two months than it saw in all of 2025.
Prior coverage:
- Around 80 students, staff 'excluded from school settings' after Broomfield measles outbreak
- Measles outbreak declared in Broomfield County after CDPHE confirms third case tied to high school
- Second measles case tied to Broomfield High School confirmed by CDPHE as exposure locations expand
- Measles case confirmed in Broomfield County, per CDPHE
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