London, ON – The Middlesex-London Health Unit is reporting the first case of measles in the Middlesex-London Region for 2025. Although there have been several measles exposures reported over the past few weeks, this is the first laboratory-confirmed measles case in a Middlesex-London resident since March 2024.
The individual was likely exposed while visiting a neighbouring jurisdiction. All individuals in the Middlesex-London region exposed to the case have been notified.
“Middlesex-London Health Unit is working with the province and neighbouring health units to minimize the transmission of measles in Southwestern Ontario. Although the transmission of measles within Middlesex-London is currently limited, it is critical that everyone takes this opportunity to ensure they are immune to this virus,” says Dr. Alex Summers, Medical Officer of Health, Middlesex-London Health Unit. “As the situation evolves, we will provide updated guidance to the community.”
In general, those born before 1970 are considered immune against measles. Those born in or after 1970 should check their immunization records to make sure that they and their family members are up-to-date with two doses of measles vaccination (listed as MMR or MMRV in most records).
Two doses are recommended for anyone born in or after 1970. Those who believe they are unvaccinated or under vaccinated should speak to their health care provider or a walk-in clinic about getting their immunizations up to date. Two doses of the measles vaccine are nearly 100% effective in preventing illness. For more information visit https://www.healthunit.com/measles.
Symptoms of measles may include:
• Fever, cough and runny nose
• Red and irritated eyes
• Small white, grey or blue spots in the mouth
• Red, blotchy rash (which is the last symptom to appear)
The Health Unit asks that anyone who thinks they have measles isolate at home to avoid spreading the virus to others. If medical care is required, they are asked to call ahead so that their health care provider can put precautions in place prior to their arrival. Measles is very contagious and spreads through droplets in the air. One infected person can easily and unknowingly spread the virus to an entire room of people.