Increase in Measles Cases as Colorado Experiences New Outbreak

Sun 1st Jun, 2025

Recent reports indicate a slight uptick in measles cases across the United States, with Colorado confirming a new outbreak. As of the latest data, the Centers for Disease Control and Prevention (CDC) has recorded a total of 1,088 confirmed cases of measles nationwide, marking an increase of 42 cases from the previous week.

Texas remains a focal point of the outbreak, with the state reporting an additional 10 cases, bringing its total to 738. This outbreak has been particularly severe, affecting various counties, with McLennan County, which includes Waco, recently added to the list of areas grappling with the virus.

In addition to Texas, there are significant measles outbreaks reported in Canada and Mexico. Ontario has recorded 1,888 cases from mid-October until May 27, while Alberta has seen 628 cases, and Chihuahua, Mexico, has reported 1,693 cases along with three fatalities.

The recent surge in measles cases in the U.S. has led to the tragic deaths of two unvaccinated children in Texas and one adult in New Mexico. The CDC identifies several states as experiencing ongoing outbreaks, including Colorado, Kansas, Michigan, Montana, North Dakota, Ohio, Pennsylvania, and Tennessee.

Measles is an extremely contagious viral infection that spreads through the air when an infected individual coughs, sneezes, or breathes. Though the virus has been considered eliminated in the U.S. since 2000, the current situation underscores the importance of vaccination.

In Texas, the majority of cases are concentrated in Gaines County, where a close-knit, undervaccinated Mennonite community has faced significant challenges. This county alone accounts for 409 cases since late January, which represents over 1.7% of its population. State health officials report that less than 1% of current cases are actively infectious.

New Mexico reported a new case this week, bringing its total to 79, with seven individuals hospitalized since the outbreak began. Most cases are concentrated in Lea County, with other counties reporting minimal cases. In Oklahoma, cases have remained stable at 14 confirmed and three probable cases.

In Colorado, the state health department has identified a new outbreak consisting of three related cases, all linked to an international flight that landed at Denver International Airport in mid-May. Two of the confirmed cases are in Arapahoe County, involving an unvaccinated child under five and another vaccinated adult. Fortunately, there is currently no evidence of further transmission from this outbreak.

Kansas has reported a total of 64 measles cases across 11 counties, while Michigan has confirmed eight cases, including a cluster of four linked to the ongoing Ontario outbreak. Montana has also seen its first measles cases in 35 years, with a total of 13 cases reported.

North Dakota has experienced a resurgence of measles, with 29 confirmed cases. Ohio's count remains at 34 confirmed cases, with two outbreaks ongoing in Ashtabula and Knox counties. Pennsylvania and Tennessee have reported steady case numbers as well, with Pennsylvania maintaining 15 cases overall and Tennessee recording six cases since early May.

Measles cases are also appearing in numerous other states, including Alaska, California, Florida, and New York. The CDC has noted that many of these cases can be traced back to unvaccinated individuals returning from abroad, emphasizing the critical need for vaccination.

The best defense against measles remains the measles, mumps, and rubella (MMR) vaccine, which is recommended for children between 12 and 15 months, with a second dose given between 4 and 6 years of age. Adults concerned about waning immunity can safely receive an additional MMR shot.

Measles symptoms typically begin with a high fever, followed by respiratory symptoms and a characteristic rash that can lead to severe complications, including pneumonia and encephalitis. There is currently no specific treatment for measles, and management focuses on relieving symptoms and preventing complications.


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