The Kane County Health Department has identified two locations where individuals may have been exposed to a confirmed measles case. The individual, who was unvaccinated, is no longer infectious.

Potential exposure sites include:

• Kaneland High School in Maple Park during the school day on Aug. 18.
• Next Generation Pediatric Clinic at 107 S. McLean Blvd. in South Elgin on Aug. 21 between 12:30 and 4 p.m.

This is the fifth reported measles case in Illinois in 2026 and the first in Kane County since 2019. The health department noted that additional exposure information may be released as the investigation continues.

“We understand that news of a confirmed measles case may be concerning, particularly when there are potential exposures in schools and other community settings,” Michael Isaacson, the Kane County Health Department’s executive director, said in the news release. “Our priority is identifying people who may have been exposed, making sure they receive timely guidance, and providing the community with accurate information as the investigation continues.”

The health department advised that anyone unprotected and potentially exposed should quarantine for 21 days from the date of exposure. Evidence of immunity includes documentation of two doses of the MMR vaccine, laboratory evidence of immunity, or laboratory confirmation of a previous infection. People born before 1957 are generally assumed to have immunity.

Symptoms of measles include high fever, cough, runny nose, red eyes, and a rash. The virus can spread through the air via coughing or sneezing. Those developing symptoms who believe they were exposed should call a healthcare provider before visiting a medical office or emergency department.

A call center has been opened to answer questions regarding symptoms, vaccination, or quarantine. It is staffed Monday through Friday, 9 a.m. to 4 p.m., at 331-240-3311.