The Region of Waterloo’s public health unit has added 12 more locations to its list of potential measles exposure sites. As of Wednesday, there were a total of 21 places identified on public health’s website. The new additions include: The following locations were previously listed on public health’s website: As of May 8, a total of 48 measles cases had been reported in the Region of Waterloo. That same week, 920 secondary school students were suspended because their vaccinations records were not up-to-date. Public health said 5,032 suspension orders were initially sent out to parents in mid-March to remind then of the May 7 suspension deadline. According to Public Health Ontario’s latest epidemiological summary, there were 1,440 confirmed or probable cases of measles in the province between Oct. 18, 2024 and May 6, 2025. What to know about measles Measles is a highly contagious virus. The disease can spread through the air when an infected person coughs, sneezes or breathes. Even brief exposure to measles can result in illness. Symptoms include a fever, runny nose, cough, red watery eyes, small white spots inside the mouth and a red blotchy rash. Other signs of measles include diarrhea, ear infections and pneumonia. In severe cases, measles can cause brain inflammation and death. It usually takes between seven and 21 days for symptoms to show up. Anyone who believes they may have been exposed to measles is asked to stay at home and avoid contact with others. If medical treatment is needed, people are urged to contact their health provider ahead of time to prevent the illness from spreading to other patients.