
Measles Exposures in Ontario
Ongoing measles transmission in Ontario is impacting multiple public health units. Detailed information on measles cases in Ontario can be found in the Measles in Ontario Enhanced Epidemiological Summary.
For each measles case reported in Ontario, a public health investigation is completed to identify places where people may have been exposed to the measles virus.
Individuals who are not protected against measles AND who were in places where they may have been exposed to a case of measles on the following places and dates of possible exposure should check the website for their local public health unit for more information.
Getting vaccinated is the best way to protect yourself against measles.
The information on this webpage is updated on Tuesdays and Fridays. Please check your local public health unit website for updated information.
On this page:
- Places and dates of exposure to a case of measles
- What is measles?
- What to do if you are exposed to measles
Places and dates of exposure to a case of measles
Places visited by recent measles cases while infectious have been identified. Individuals who were in the following places during the dates and times specified should contact their local public health unit if they are not protected against measles. See the section What to do if you are exposed to measles to find out more.
These exposure sites have been compiled from public advisories issued by public health units and will be updated regularly, as the information may change as new cases are identified and current exposures become out of date. Please note: this list includes only known exposure sites and there may be sites that have not yet been identified.
Last updated on March 18, 2025
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Chatham-Kent Health Alliance - Emergency Department |
Chatham |
March 13 between 6:25PM and 8:30 PM |
April 3 |
Walmart |
Chatham |
March 10 between 10:00AM and 1:30PM March 7 between 11:15AM and 2:30PM |
March 31 March 28 |
Country Kitchen |
Chatham |
March 7 between 9:30AM and 1:15PM |
March 28 |
Tim Horton's Park Avenue |
Chatham |
March 6 between 4:45PM and 7:15PM |
March 27 |
EarlyON - W.J. Baird Site |
Blenheim |
March 4 and March 6 between 7:45 AM and 10 AM |
March 27 |
Growing Together Family Resource Centre – W.J. Baird Site |
Blenheim |
March 4, 5, 6, 7 between 7:45 AM and 10 AM |
March 28 |
Thamesview Family Health Team |
Chatham |
March 6 between 2:15 PM and 4:45 PM March 5 between 11 AM and 1:30 PM |
March 27 March 26 |
Tilbury Walk-In Clinic |
Tilbury |
March 6 between 9:30 AM and 12:30 PM March 5 between 2 PM and 6 PM |
March 27 March 26 |
Blenhim Golden Eagles Gymnastics Club |
Blenheim |
March 6 between 6:30 PM and 9:40 PM |
March 27 |
YMCA Chatham |
Chatham |
March 6 between 12:45 PM and 4:05 PM February 25 between 1:00 PM and 4:30pm |
March 27 March 18 |
Angela Merici Catholic School - gym and common areas |
Chatham |
March 6 between 5:15 PM and 9:15 PM |
March 27 |
Ebenezer Christian School - Ballhawks practice |
Chatham |
March 4 between 7:30 PM and 11:30 PM |
March 25 |
Chatham Christian School - Badminton practice |
Chatham |
March 4-6 between 3:30 PM and 5:30 PM |
March 27 |
Municipality of Chatham-Kent Tilbury Municipal Office |
Tillbury |
March 3 between 9:30AM and 12:10PM |
March 26 |
ONroute Tilbury - 401 Westbound |
Tilbury |
March 1 between 5:00 PM and 8:00 PM |
March 22 |
No Frills Chatham |
Chatham |
March 5 between 10 AM and 2 PM |
March 26 |
Chatham Christian School Discovery Day – Kindergarten Registration |
Chatham |
February 28 between 8:30 AM and 5PM |
March 21 |
Chatham Christian School Celebration of Learning Event |
Chatham |
February 27 between 6 PM and 10:30 PM |
March 20 |
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Hamilton Medical Centre and Walk-in Clinic |
Hamilton |
March 5 between 9:15 AM and 12 PM |
March 26 |
Costco – Stoney Creek |
Stoney Creek |
March 5 between 3:30 PM and 7:30 PM |
March 26 |
McMaster Children's Hospital - Emergency Department |
Hamilton |
March 6 between 7:53 PM and 8:53 PM |
March 27 |
Stoney Creek Medical Walk-in Clinic |
Hamilton |
March 6 between 6:40PM and 9 PM |
March 27 |
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Stratford General Hospital - Emergency Room |
Stratford |
March 9 between 11:30 AM and 2:00 PM |
March 30 |
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Norfolk General Hospital – Emergency Department |
Simcoe |
March 11 between 2:00 PM and 5:00 PM March 9 between 3:30 PM and 6:00 PM February 26 between 6:15 AM and 8:30 PM February 19 between 6 PM and 10:15 PM |
April 1 March 30 March 19 March 12 |
Delhi Community Health Centre Walk-in Clinic |
Delhi |
March 7 between 10:00 AM and 2:00 PM February 8 between 9 AM and 12 PM |
March 28 March 1 |
Glen Meyer Old Colony School |
Langton |
March 3, 4 and 5 between 8:45 AM and 5:00 PM |
March 26 |
Family Practice Office, Roulston's Pharmacy |
Simcoe |
March 4 between 1 PM and 5:30 PM |
March 25 |
Valley Heights SS |
Langton |
February 25 between 6:00 PM and 9:30 PM |
March 18 |
Dover Dental |
Port Dover |
February 21 between 1 PM and 4 PM |
March 14 |
Blue Elephant |
Simcoe |
February 19 between 5 PM and 9 PM |
March 12 |
Norfolk General Hospital |
Simcoe |
February 19 between 6 PM and 10:15 PM |
March 12
|
Wilkinson’s Your Independent Grocer |
Delhi |
February 14 between 7 AM and 5:30 PM |
March 7 |
Tim Hortons (A-wing, 1st floor) |
Brantford |
February 12 between 9 AM and 11:15 AM February 11 between 10 AM and 12:15 PM February 11 between 4 PM and 6:15 PM February 10 between 4 PM and 6:15 PM |
March 5 March 4 March 4 March 3 |
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Value Village |
London |
March 1 between 10:45 AM and 3:00 PM |
March 22 |
Victoria Hospital - Adult Emergency Department |
London |
February 28 between 10:43 PM |
March 22 |
Children's Hospital - Pediatric Emergency Department |
London |
February 20 between 5:29PM and 7:41PM February 18 between 8:45 PM and 11:15 PM |
March 13 March 11 |
Niagara Region Public Health Unit
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
MedCare Clinic 387 Scott St, Unit A2C |
St. Catharines |
March 2 between 4:20 PM and 6:20 PM |
March 23 |
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Toronto Pearson International Airport, Terminal 1 |
Mississauga |
March 2 between 4:50 PM and 7:40 PM February 24 between 8:36 AM and 12 PM February 22 between 9:35 AM and 1 PM |
March 23 March 17 March 15 |
Trillium Health Partners Credit Valley Hospital - Emergency Department |
Mississauga |
Between February 27 at 8:45 PM |
March 21 |
Aboud Health Walk-in Clinic and Pharmacy 422 Burnhamthorpe Rd W |
Mississauga |
February 27 between 3:15 PM and 7 PM |
March 20 |
Cornerstone Medical Centre-Walk-In Urgent Care & adjoining Pharmacy |
Brampton |
February 16 between 1:52 PM and 5:13 PM |
March 9 |
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Central Hastings Family Team |
Madoc |
February 27 between 11:11 AM and 1:16 PM |
March 20 |
Southwestern Public Health Unit
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Woodstock Hospital Emergency Department |
Woodstock |
March 14 between 12:15PM and 2:30PM March 12 between 6:57PM and 9:04PM March 11 between 7:09 AM and 9:30 AM March 5 between 1:43 PM and 5:16 PM March 2 between 9:40AM and 12:16PM February 27 between 6:14 AM and 8:23 AM February 23 between 8:20 PM and 10:30 PM February 21 between 10:43 AM and 1:26 PM Between February 17 at 10:38 PM and February 18 at 1:47 AM |
April 4 April 2 April 1 March 26 March 23 March 20 March 16 March 14 March 11 |
Tillsonburg District Memorial Hospital - Emergency Department |
Tillsonburg |
March 10 between 6:05 PM and 10:32 PM March 9 between 10:55 AM and 2:39 PM March 6 between 1:50 PM and 3:55 PM March 3 between 4:30 PM and 6:40 PM February 27 between 12:57 PM to 5:37 PM |
March 31 March 30 March 27 March 24 March 20 |
St. Thomas Elgin General Hospital Emergency Department |
St. Thomas |
March 4 between 3:00 PM and 6:00 PM March 2 between 6:30 PM and 10:03 PM March 1 between 10:00 PM February 27 between 1:30 PM and 4:00 PM February 19 between 12:55 PM and 3:25 PM February 17 between 9:20 PM and 11:47 PM February 16 between 5 PM and 7:26 PM Between February 13 at 5:15 PM February 9 between 5 AM and 10:45 AM |
March 25 March 23 March 23 March 20 March 12 March 10 March 9 March 7 March 2 |
Tillsonburg Medical Centre |
Tillsonburg |
February 25 between 1:30 PM and 4:12 PM |
March 18 |
Alexandra Hospital Emergency Department |
Ingersoll |
February 21 between 8:53 PM and 11:05 PM |
March 14 |
RBC Royal Bank |
Tillsonburg |
February 18, 19, 20 between 8 AM and 5 PM |
March 13 |
East Elgin Community Complex |
Aylmer |
February 17 between 5 PM and 8 PM February 15 between 9 AM and 1 PM |
March 10 March 8 |
LifeLabs Medical Laboratory |
Woodstock |
February 12 between 10:11 AM and 12:35 PM |
March 5 |
Lifelabs Medical Laboratory |
Aylmer |
February 10 between 10:30 AM and 2:15 PM |
March 3 |
St. Thomas Walk-in Medical Clinic |
St. Thomas |
February 9 between 9:30 AM and 1:30 PM February 8 between 12:30 PM to 5:30 PM February 7 between 7 PM and 9 PM |
March 2 March 1 February 28 |
Remedy’s Rx – Health Centre Pharmacy Inc |
St. Thomas |
February 8 between 12:30 PM and 5:30 PM |
March 1 |
Windsor-Essex County Health Unit
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Erie Shores Health Care- Emergency Room |
Leamington |
March 14 between 8:00 AM and 11:23 AM March 7 between 9:30PM and 10:05PM March 6 between 6:50 PM and 1:54 AM on March 7 |
April 4 March 28 March 28 |
Windsor Regional Hospital - Metropolitan (Met) Campus - Main Entrance 1995 Lens Avenue |
Windsor |
March 12 between 11:30 AM and 7:30 PM March 2 between 9:30 AM and 1:30 PM |
April 2 March 23 |
Erie Shores WIC |
Leamington |
March 11 between 12:30PM and 5:30PM March 6 between 12:30 PM and 3:30 PM |
April 1 March 27 |
Real Canadian Superstore Talbot St |
Leamington |
March 8 between 11:00AM and 1:30PM |
March 29 |
TMC Kingsville WIC/Urgent Care |
Kingsville |
March 8 between 1:15 PM and 3:35 PM March 1 between 9:20 AM and 12:14 PM |
March 29 March 22 |
Fresh Co. |
Leamington |
March 7 between 12:00 PM and 4:00 PM |
March 28 |
Toldo Lancer Center |
Windsor |
March 7 between 6:30 PM and 11:30 PM |
March 28 |
Chick-Fil-A |
Windsor |
March 7 between 5:30 PM and 8:00 PM |
March 28 |
Walmart Supercentre |
Leamington |
March 7 between 10:00AM and 3:30PM March 1 between 5:00 PM and 11:00 PM |
March 28 March 22 |
Old Colony Christian Academy Kingsville |
Kingsville |
March 3 between 9:00 AM and 5:30 PM February 28 between 9:00 AM and 5:30 PM |
March 24 March 21 |
La Toxica Mexican Food |
Leamington |
March 2 between 4:00 PM and 11:00 PM |
March 23 |
Cornerstone Christian Academy 1664 Talbot Rd |
Ruthven |
February 21 to February 24 |
March 17 |
Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
---|---|---|---|
Southlake Health – Pediatric Unit |
Newmarket |
February 25 between 8:25 AM and 4PM |
March 18 |
Southlake Health – Emergency Department 596 Davis Dr |
Newmarket |
February 24 between 10:45 AM and 9 PM |
March 17 |
What is measles?
Measles is a respiratory infection that is highly contagious. Individuals with measles spread the virus by coughing or sneezing into the air. It can also be transmitted by touching your eyes, nose, or mouth after touching an infected surface. Symptoms of measles include fever, cough, runny nose, red watery eyes, and a red blotchy rash.
What to do if you are exposed to measles
If you are protected against measles, it is very unlikely that you will develop the disease. As a precautionary measure, watch for the onset of measles symptoms until 21 days after the date of exposure (see Places and dates of possible exposure to a case of measles) to find out more.
People are considered protected if they have at least one of the following:
- Proof of vaccination with two valid doses of measles-containing vaccine (e.g. MMR vaccine)
- Blood work showing antibodies to measles
- Documentation of prior laboratory-confirmed measles infection
- Are born before 1970 (with the exception of health care workers)
- All health care workers require evidence of vaccination with two valid doses of measles-containing vaccine or bloodwork suggestive of immunity (measles IgG reactive) regardless of year of birth
If you do not have any of the above, you are not protected against measles.
If you think you have been exposed and you are not protected against measles or if you are unsure about your immunization history:
- If you attend or work at a school, childcare, or healthcare setting, you MUST stay home and contact your local public health unit for further direction.
- If you have had no doses of MMR vaccine, stay at home and contact your local public health unit for further direction.
- If you have had one dose of MMR vaccine, call your healthcare provider or local public health unit to receive an additional dose of MMR vaccine. Notify your healthcare provider of your exposure so that they can take appropriate precautions to limit the spread of measles. Unless you work in a healthcare setting, you can immediately return to work, school, or daycare after you get a second dose of measles-containing vaccine.
- If you (or a family member) are at high risk of complications as listed below, contact your healthcare provider or local public health unit to discuss options to reduce the risk of measles infection through vaccination or a product called immunoglobulin. For these to be effective, they must be given very soon after exposure.
- Babies under one year age who have not received measles vaccine
- People with a severely weakened immune system
- Pregnant individuals who are not protected against measles
- If you are uncertain about your vaccination status, call your healthcare provider or your local public health unit to determine if you have received an MMR vaccine in the past.
- Watch for the onset of measles symptoms until 21 days after the date of exposure (see Places and dates of possible exposure to a case of measles).
- If you develop symptoms and need medical care, call ahead before you visit the doctor, clinic, or hospital to inform them of your exposure to measles so they can prepare for your arrival and take appropriate precautions.
- If you develop symptoms and do not need medical care, call your local public health unit.
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