What you need to know as measles makes a resurgence

The United States is currently experiencing a growing and unprecedented measles outbreak. Colorado reported its first case on March 31, 2025. Measles, which was considered eliminated in 2000, is one of the most contagious acute viral respiratory illnesses. Transmitted through the air when an infected person coughs, sneezes or talks, it can remain airborne for two hours.

Measles symptoms include high fever, cough, runny nose, red or bloodshot eyes, white spots in the mouth (Koplik spots), rash, digestive symptoms, sore throat, muscle pain and headache.

As measles cases continue to rise, we’ve compiled state, national and Children’s Hospital Colorado resources to help you manage measles cases and educate patients and families.

https://www.childrenscolorado.org/health-professionals/clinical-resources/measles/