Measles Outbreak Linked to Chi-Cheemaun Ferry in Sudbury Region

Public Health Sudbury and Districts has reported a concerning outbreak of measles in the Sudbury area, identifying 40 cases linked to travel on the Chi-Cheemaun ferry over recent weeks. This outbreak is part of a broader trend of measles infections across North America, prompting health officials to urge vaccination among residents.

On July 25, 2025, Public Health Sudbury released a statement detailing how an initial measles infection, undetected until recently, led to a chain of transmissions affecting multiple individuals, including infants. The health unit has traced the infections back to the ferry service that operates between South Baymouth and Tobermory, Ontario. Dr. M. Mustafa Hirji, Acting Medical Officer of Health, highlighted the importance of vaccination, noting that over 95% of recent infections in Ontario occurred in individuals who were not fully vaccinated.

The outbreak started approximately seven weeks ago, with the health unit establishing connections to the ongoing measles outbreak affecting North America. As of now, the majority of the identified infections have resolved, but Public Health officials continue to investigate further chains of transmission.

In addition to the ferry, the Manitoulin Health Centre's emergency department in Mindemoya has also been identified as a potential exposure site. Dr. Hirji stated, "Public Health has identified some recent public locations where members of the general public may have been exposed to measles."

Public Health has specified several critical dates for people who may have traveled on the Chi-Cheemaun ferry: - July 21: Tobermory to South Baymouth (1:15 PM) and return (3:30 PM) - July 17: South Baymouth to Tobermory (11 AM) and return (1:15 PM) - June 30: Tobermory to South Baymouth (8:45 AM) and return (11 AM) - Additional dates include various trips between June 26 and June 24.

Exposure at Manitoulin Health Centre occurred during specific hours on June 27, June 7, and June 5.

Symptoms of measles, which can emerge 7 to 21 days after exposure, include fever, runny nose, cough, conjunctivitis, Koplik's spots, and a characteristic rash. Measles is highly contagious, capable of spreading through the air and remaining viable on surfaces for up to two hours.

Dr. Hirji urged residents to verify their immunization status and consult healthcare providers if they suspect exposure. "Measles can lead to severe complications including pneumonia, encephalitis, and even death, making vaccination critical for community health," he emphasized.

As Public Health Sudbury continues its investigation, residents are encouraged to monitor for symptoms and report any concerns to health officials. Vaccination against measles remains the most effective means of prevention, with the measles, mumps, and rubella (MMR) vaccine being both safe and effective.

For further information, individuals can contact Public Health Sudbury and Districts or visit their official website. Health811 is also available for 24/7 advice regarding symptoms and vaccination.

In conclusion, the recent outbreak serves as a stark reminder of the importance of vaccination in preventing communicable diseases. With measles outbreaks occurring globally, local health officials stress that proactive measures and community awareness are essential in safeguarding public health.