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.
In response to the current outbreak, in addition to routine immunizations, some public health units are offering early doses of measles vaccine (i.e., a dose of MMR vaccine for infants 6 to 11 months; a second dose of measles-containing vaccine before the age of 4) in affected regions and communities where the risk of exposure to measles is higher. Please visit Huron Perth Public Health, Southwestern Public Health, Grand Erie Public Health, and Windsor-Essex County Health Unit for more information.
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and will be updated regularly, as the information may change as new cases are identified and current exposures become out of date.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 April 22, 2025
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
No Frills Tilbury |
Tilbury |
April 14 between 5:30 PM and 8:30 PM |
May 5 |
Dollarama – Thames-Lea Plaza |
Chatham |
April 12 between 6:00 PM and 9:00 PM |
May 3 |
Foodland |
Tilbury |
April 12 between 6:45 AM and 6:00 PM April 8 between 6:45 AM and 6:00 PM |
May 3 April 29 |
Tilbury Walk-In Clinic |
Tilbury |
April 4 between 2:15 PM and 4:30 PM April 2 between 9:00 AM and 11:30 AM |
April 25 April 23 |
Chatham-Kent Health Alliance |
Chatham |
March 28 between 9:40 PM and 11:50 PM
|
April 18
|
Food Basics |
Chatham |
March 25 between 3:15 PM and 6:00 PM |
April 15 |
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Houghton Public School |
Langton |
April 10 between 8:30 AM and 5:30 PM April 8 between 8:30 AM and 5:30 PM |
May 1 April 29
|
Eat & Drink Norfolk CIBC Auditorium Building #9, Norfolk County Fairgrounds |
Simcoe |
April 5 between 6:30 PM and 9:00 PM |
April 26 |
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Brightshores Health System’s Owen Sound Hospital – Emergency Room |
Owen Sound |
Between April 2 at 9:37 PM and 8:28 AM on April 3 |
April 24 |
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Stratford General Hospital |
Stratford |
April 17 between 4:15 PM and 7:40 PM April 11 between 2:20 PM and 4:30 PM April 5 between 10:30 AM and 1:30 PM March 28 between 11:10 AM and 1:10 PM |
May 8 May 2 April 26 April 18 |
Canada Post |
Milverton |
April 5, 2025, to April 13, 2025 |
May 4 |
Milverton Mini Mart |
Milverton |
April 11 between 10:00 AM and 1:00 PM |
May 2 |
Knollcrest Lodge Long-Term Care Home |
Milverton |
April 10 between 2:45 PM and 11:30 PM April 9 between 6:00 AM and 4:30 PM |
May 1 April 30 |
LCBO |
Milverton |
April 10 between 10:00 AM and 1:00 PM |
May 1 |
Wingham & District Hospital |
Wingham |
April 9 between 9:15 AM and 12:05 PM |
April 30 |
St. Joseph's Catholic Church |
Stratford |
April 5 between 1:00 PM and 4:30 PM |
April 26 |
Long & McQuade Music Instruments |
Stratford |
April 5 between 9:55 AM and 12:35 PM |
April 26 |
Ross' Bike Works |
Stratford |
April 5 between 10:10 AM and 12:10 PM |
April 26 |
C and K Custom Kovers and Kathy’s Dry Goods |
Poole |
April 4 between 9:00 AM and 11:30 AM April 1 between 8:00 AM and 7:00 PM March 31 between 8:00 AM and 7:00 PM |
April 25 April 22 April 21 |
Wingham and District Hospital |
Wingham |
March 30 between 9:00 PM and 11: 00 PM March 30 between 1:49 PM and 6:00 PM March 29 between 12:00 AM and 1:15 AM March 28 between 9:39 PM and 11:59 PM |
April 20 April 20 April 19 April 18 |
IDA Listowel Pharmacy and Care Clinic |
Listowel |
March 29 between 12:30 PM and 3:00 PM |
April 19 |
KFC |
Listowel |
March 28 between 6:30 PM and 9:30PM |
April 18 |
Listowel Memorial Hospital
Emergency Department |
Listowel |
March 28 between 9:07 AM and 12:21 PM March 24 between 2:13 PM and 11:45 PM March 23 between 1:51 PM and 10:31 PM |
April 18 April 14 April 13 |
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Bluewater Health Petrolia |
Petrolia |
Between April 7 at 7:30 PM and 2:00 AM on April 8 |
April 29 |
Bluewater Health Sarnia |
Sarnia |
April 8 between 5:00 AM and 1:30 PM
|
April 29
|
Lambton Central Collegiate & Vocational Institute |
Petrolia |
April 3 between 8:00 AM and 4:30 PM |
April 24 |
Peoples Church |
Wyoming |
April 2 between 6:30 PM and 10:30 PM |
April 23 |
| Exposure Location |
City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
White Oaks Mall |
London |
April 6 between 6:30 PM and 11:00 PM |
April 27 |
|
LHSC Victoria Hospital |
London |
April 6 between 8:05 AM and 10:15 AM March 23 between 1:19 PM and 3:46 PM |
April 27 April 13 |
|
LHSC University Hospital |
London |
April 1 between 11:59 AM and 2:08 PM |
April 22 |
|
Casa Cubana |
London |
March 29 between 4:30 PM and 9:30 PM |
April 19 |
|
Jehovah’s Witness Convention |
London |
March 29 between 9:30 AM and 6:00 PM |
April 19 |
|
Carling Heights Optimist Community Centre |
London |
March 29 between 2:40 PM and 8:30 PM |
April 19 |
|
Costco Wholesale |
London |
March 29 between 1:30 PM and 4:00 PM |
April 19 |
|
LHSC Victoria Hospital B5 Pod 1 & 2 OB and GYNE Obstetrical Ultrasound B5 OB Pod 1 & 2 (waiting room) General Surgery |
London |
March 28 between 9:00 AM and 1:21 PM March 28 between 9:39 AM and 12:09 PM March 25 between 7:00 AM and 2:00 PM March 25 between 11:15 AM and 3:00PM |
April 18 April 18 April 15 April 15 |
|
St Joseph’s Hospital Urgent Care Centre (UCC) |
London |
March 23 between 10:00 AM and 2:00 PM |
April 13 |
Northeastern Public Health Unit
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Ontario Northland Bus |
N/A |
March 29 between 3:15 PM and 10:00 PM |
April 19 |
Englehart Motel |
Englehart |
March 29 between 7:20 PM and 9:20 PM |
April 19 |
North Bay Parry Sound Public Health Unit
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
North Bay Regional Health Centre |
North Bay |
Between April 1 at 4:30 PM and 12 AM on April 3 |
April 21 |
Ontario Northland Bus |
N/A |
March 29 between 3:15 PM and 10:00 PM |
April 19 |
Northgate Shopping Centre |
North Bay |
March 29 between 3:15 PM and 6:15 PM |
April 19 |
Ontario Northland Bus Terminal |
North Bay |
March 29 between 3:15 PM and 6:15 PM |
April 19 |
Ontario Northland Bus |
N/A |
March 29 between 3:15 PM and 5:30 PM |
April 19 |
Ontario Northland Bus |
N/A |
March 29 between 12:00 PM and 3:15 PM |
April 19 |
Renfrew County and District Health Unit
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Veteran's Park |
Cobden |
March 29 between 11:30 AM and 2:00 PM |
April 19 |
Ontario Northland Bus |
N/A |
March 29 between 12:00 PM and 3:15 PM |
April 19 |
Pronto |
Petawawa |
March 29 between 1:00 PM and 3:15 PM |
April 19 |
Simcoe Muskoka District Health Unit
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Royal Victoria Health Centre |
Barrie |
March 30 between 6:30 PM and 11:45 PM |
April 20 |
CIBC |
Barrie |
March 27 between 2:45 PM and 5:30 PM |
April 17 |
Walmart |
Barrie |
March 27 between 2:45 PM and 5:30 PM |
April 17 |
Fika Cannabis |
Barrie |
March 27 between 3:30 PM and 6:00 PM |
April 17 |
Rexall Pharmacy |
Barrie |
March 27 between 3:30 PM and 6:00 PM |
April 17 |
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Prince Edward County Memorial Hospital |
Prince Edward County |
April 11 between 12:00 PM and 3:30 PM |
May 2 |
Cineplex Kingston |
Kingston |
April 10 between 4:20 PM and 8:00 PM |
May 1 |
Lennox & Addington County General Hospital |
Napanee |
April 10 between 7:00 PM and 11:47 PM |
May 1 |
Tamworth Elementary School |
Tamworth |
Between April 3 and April 10 |
May 1 |
Kingston Family Health Team – Centennial Family Physician’s Office (including onsite LifeLabs patient service centre) |
Kingston |
April 7 between 3:00 PM and 5:35 PM |
April 28 |
Red’s Diner |
Trenton |
April 6 between 10:30 AM and 1:30 PM |
April 27 |
Tim Hortons |
Kingston |
April 5 between 8:30 AM and 11 AM |
April 26 |
Tamworth Post Office |
Tamworth |
April 4 between 4:10 PM and 6:10 PM |
April 25 |
Foodland |
Picton |
April 4 between 11:00 AM and 1:20 PM |
April 25 |
Gillingham Brewing Company |
Bloomfield |
April 4 between 3:30PM and 7:30 PM |
April 25 |
Nicholson Catholic College |
Belleville |
April 4 between 8 AM and 5 PM |
April 25 |
VIA Rail |
N/A |
April 4 between 5:10 PM and 8 PM |
April 25 |
Hotel Dieu Hospital Urgent Care |
Kingston |
April 3 between 11:00 AM and 5:00 PM |
April 24 |
Megabus |
N/A |
March 31 between 4:35 PM and 9:15 PM |
April 21 |
Duncan McArthur Hall |
Kingston |
March 30 between 11:00 AM and 10:00 PM March 29 between 5:00 PM and 8:00 PM |
April 20 April 19 |
Southwestern Public Health Unit
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Tillsonburg District Memorial Hospital |
Tillsonburg |
March 31 between 10:55 AM and 1:17 PM March 25 between 8:44 AM and 12:45 PM |
April 21 April 15 |
St. Thomas Elgin General Hospital |
St. Thomas |
March 26 between 1:13 PM and 3:35 PM (exam room) March 26 between 1:00 PM and 3:13 PM March 25 between 12:20 PM and 2:53 PM |
April 16
April 16 April 15 |
Woodstock Hospital |
Woodstock |
March 26 between 2:33 PM and 4:43 PM |
April 16 |
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Coca-Cola Coliseum |
Toronto |
April 1 between 5:30 PM and 11:59 PM |
April 22 |
Fantasy Fair, Woodbine Mall |
Etobicoke |
March 30 between 11:30 AM and 5:00 PM |
April 20 |
Region of Waterloo Public Health
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
WRHN @ Midtown (formerly Grand River Hospital, KW Campus) |
Kitchener |
Between April 14 at 6:30 PM and 3:00 AM on April 15 |
May 6 |
Jembrook Welding |
West Montrose |
April 4 between 7:30 AM and 8:00 PM |
April 25 |
Region of Waterloo International Airport (YKF) Main Terminal |
Breslau |
Between March 29 at 8:20 PM to 1:00 AM on March 30 |
April 20 |
Flair Airlines, Flight F82431 - Puerto Vallarta, Mexico (PVR) to Region of Waterloo (YKF) |
N/A |
March 29 |
April 19 |
Grand River Hospital |
Kitchener |
March 29 between 4:00 PM and 7:00 PM |
April 19 |
Three Bridges Old Colony Christian School |
St Jacobs |
Between March 26 and March 28 |
April 18 |
John BM Martin Manufacturing |
St Clements |
March 26 between 6:40 AM and 9:30 AM March 24 between 6:30 AM and 7:00 PM |
April 16 April 14 |
Woolwich Community Health Centre (Wellesley) |
Wellesley |
March 25 between 5:15 PM and 9:00 PM |
April 15 |
Windsor-Essex County Health Unit
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
Windsor Regional Hospital - Metropolitan (Met) Campus |
Windsor |
April 17 between 7:30 AM and 10:45 AM (Main Building Lobby, Lobby Elevators, First Floor Elevators, 3rd Floor Outpatients) April 9 between 7:00 PM and 10:30 PM (Emergency Department, 3rd floor Pediatrics) |
May 8
April 30 |
Our Lady of the Annunciation Catholic Elementary School |
Stoney Point |
April 15 between 9:15 AM and 5:35 PM |
May 6 |
Margaret D Bennie Public School |
Leamington |
April 14 between 9:15 AM and 4:50 PM April 11 between 9:15 AM and 4:50 PM |
May 5 May 2 |
Real Canadian Superstore Talbot Street |
Leamington |
April 11 between 6:00 AM and 4:30 PM April 10 between 6:00 AM and 4:30 PM April 2 between 4:30 PM and 8:00 PM |
May 2 May 1 April 23 |
St. Louis Catholic Elementary School |
Windsor |
April 10 between 9:15 AM and 5:35 PM April 9 between 9:15 AM and 5:35 PM April 8 between 9:15 AM and 5:35 PM April 7 between 9:15 AM and 5:35 PM April 4 between 9:15 AM and 5:35 PM April 3 between 9:15 AM and 5:35 PM |
May 1 April 30 April 29 April 28 April 25 April 24 |
Jackson Park Health Centre |
Windsor |
April 10 between 5:50 PM and 9:20 PM April 8 between 7:00 PM and 9:15 PM |
May 1 April 29 |
Erie Shores HealthCare |
Leamington |
April 7 between 8:40 AM and 9:40 AM (Emergency Department) Between 8:35 AM on April 3 and 12:20 AM on April 4 (Emergency Department) March 26 between 12:00 PM and 6:35 PM (Main entrance and Emergency Department) March 23 at 9:15 PM to March 24 at 10:20 AM (Emergency Department)
|
April 28 April 25 April 16 April 13 |
TMC Kingsville Walk-in/Urgent Care |
Kingsville |
April 8 between 3:55 PM and 7:00 PM (Waiting rooms and Patient Assessment Rooms) April 7 between 12:10 PM and 2:20 PM (Waiting rooms and Patient Assessment Rooms) April 7 between 1:40 PM and 3:45 PM (Waiting rooms and Patient Assessment Rooms) April 7 between 2:05 PM and 5:10 PM (Waiting rooms and Patient Assessment Rooms) April 6 between 1:05 PM and 3:20 PM (Waiting rooms and Patient Assessment Rooms) April 5 between 11:25 AM and 2:00 PM (Waiting rooms and Patient Assessment Rooms) April 4 between 10:05 AM and 1:20 PM (Waiting rooms and Patient Assessment Rooms) April 2 between 9:00 AM and 11:45 AM (Waiting rooms and Patient Assessment Rooms) March 28 between 8:40 AM and 11:30 AM (Waiting Rooms and Patient Assessment Rooms) March 26 between 11:00 AM and 1:45 PM (Main Entrance and Waiting Room) March 25 between 9:50 AM and 12:40 PM |
April 29 April 28 April 28 April 28 April 27 April 26 April 25 April 23 April 18 April 16 April 15 |
Central Erie Shores Walk In Clinic |
Leamington |
April 7 between 11:00 AM and 5:30 PM |
April 28 |
La Hacienda Restaurant |
Leamington |
April 7 between 7:30 PM and 9:45 PM |
April 28 |
Burger King Restaurant – Leamington |
Leamington |
April 6 between 4:00 PM and 8:00 PM |
April 27 |
FreshCo - Kingsville |
Kingsville |
April 6 between 11:00 AM and 1:30 PM |
April 27 |
Kingsville Home Hardware Building Centre |
Kingsville |
April 5 between 8:00 AM and 10:15 AM |
April 26 |
Canadian Tire – Leamington |
Leamington |
April 5 between 8:30 AM and 10:45 AM |
April 26 |
Christ Church Colchester |
Colchester |
April 5 between 1:45 PM and 5:15 PM |
April 26 |
Movati Athletic Kingsville |
Kingsville |
April 5 between 11:00 AM and 2:00 PM |
April 26 |
Bank Of Commerce Building |
Windsor |
Between April 4 at 7:30 PM and 12:00 AM April 5 |
April 26 |
Dr. Robin Deans, Optometrist |
Windsor |
April 4 between 3:50 PM and 6:55 PM |
April 25 |
Multi-Food Super Market |
Windsor |
April 4 between 5:10 PM and 7:30 PM |
April 25 |
Princess Centre Leamington |
Leamington |
April 4 between 7:45 AM and 7:30 PM April 3 between 7:45 AM and 7:30 PM |
April 25 April 24 |
Maplewood Centre |
Essex |
April 3 between 1:30 PM and 4:30 PM |
April 24 |
Leamington District Secondary School |
Leamington |
April 3 between 8:15 AM and 4:15 PM April 2 between 8:15 AM and 4:15 PM April 1 between 8:15 AM and 4:15 PM March 27 between 8:15 AM and 4:15 PM March 26 between 8:15 AM and 4:15 AM March 25 between 8:15 AM and 4:15 AM |
April 24 April 23 April 22 April 17 April 16 April 15 |
Sunshine Drugs IDA Kingsville Pharmacy |
Kingsville |
April 2 between 9:00 AM and 11:45 AM |
April 23 |
Blytheswood Old Colony Church |
Leamington |
March 30 between 9:30 AM and 1:30 PM |
April 20 |
Medical Lab of Windsor |
LaSalle |
March 29 between 2:00 PM and 4:15 PM |
April 19 |
TMC Urgent Care Walkin Clinic |
Tecumseh |
March 29 between 1:00PM and 3:15PM March 24 between 12:00 PM and 10:00 PM |
April 19 April 14 |
Erie Migration District School |
Kingsville |
March 27 between 10:45 AM and 1:45 PM March 26 between 10:45 AM and 4:05 PM |
April 17 April16 |
Essex County Nurse Practitioner Lead Clinic |
Kingsville |
March 26 between 11:00 AM and 1:45 PM |
April 16 |
Queen Elizabeth Elementary School |
Leamington |
March 25 between 9:15 AM and 4:00 PM
|
April 15
|
Malotts Guardian Pharmacy |
Kingsville |
March 25 between 12:30 PM and 2:40 PM |
April 15 |
Erie Shores Family Health Team - Kingsville |
Kingsville |
March 25 between 12:30 PM and 2:40 PM |
April 15 |
Harrow Health Team |
Harrow |
March 24 between 10:50 AM and 1:40 PM |
April 14 |
Advantage Drug Mart - Guardian Pharmacy |
Windsor |
March 24 between 11:30 AM and 2:00 PM |
April 14 |
Life Labs Medical Laboratory |
Essex |
March 24 between 1:30 PM and 4:45 PM |
April 14 |
Essex Walk in Clinic |
Essex |
March 24 between 1:30 PM and 4:45 PM |
April 14 |
Pilette Medical Walk in Clinic |
Windsor |
March 24 between 11:30 AM and 2:00 PM |
April 14 |
Wellington-Dufferin-Guelph Public Health
| Exposure Location | City/Town |
Exposure Dates and Times |
Monitor for Symptoms Until |
|---|---|---|---|
FreshCo – Fergus |
Fergus |
April 4 between 7:30 PM and 10:15 PM |
April 25 |
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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