Grand Erie Public Health has announced more potential exposure sites as measles continue to spread in southwestern Ontario.
People who visited Glen Meyer Old Colony School in Langton between Feb. 21 and Feb. 25 may have been exposed to the virus.
The family practice office and pharmacy at Roulston’s Wellness Centre on Donly Drive North in Simcoe was also identified as a potential exposure site. Anyone who visited the location on Tuesday between 1 p.m .and 5:30 p.m. is encouraged to monitor for symptoms.
Anyone who was at either location has been asked to fill out a measles exposure form to complete a risk assessment.
In a media briefing on Thursday, representatives for the health unit said there have been 82 confirmed cases of measles within their boundaries since the beginning of 2025. Nineteen on those illnesses involve adults, while the rest occurred in children.
All but three cases are attributed to Norfolk County.
Nearby Southwestern Public Health is also dealing with a surge of measles, with 136 cases reported since October.
Southwestern Public Health’s Medical Officer of Health, Ninh Tran, said those number may not paint the whole picture in the area due to unreported cases.
He urged people to stay home if they are feeling unwell, noting that the rash commonly associated with measles is not the first sign that someone is sick.
“We have seen transmission happening where individuals aren’t isolating at home and that’s led to some of the transmissions,” Tran said.
Cases of measles have been reported throughout southern Ontario, including six confirmed cases in Huron and Perth reported on Thursday.
On Wednesday, Wellington-Dufferin-Guelph Public Health said someone with measles attended an event in February, but they did not say specifically when it happened or what the event was.
The health unit said they are contacting anyone who may have been exposed to the virus.
Measles symptoms
Symptoms of measles include a fever, red blotchy rash, red watery eyes and a cough, but it can also cause more serious complications including pneumonia and brain infections, leading to hospitalization.
Other symptoms can include ear infections, diarrhea, respiratory failure and encephalitis. Long-term complications can result in blindness, deafness and brain injuries.
