Measles outbreak grows in Algoma, with 34 new cases this week. Public health officials credit high vaccination rates for limiting the spread.
Surge in Infections Continues in Algoma Region
A measles outbreak in northern Ontario has entered its third consecutive week of growth, with Algoma Public Health reporting 34 new cases. The region, which includes Sault Ste. Marie, now has a total of 115 confirmed infections, including three hospitalizations.
The increase follows the area’s first reported case of the year on April 23. According to Public Health Ontario, the province recorded 96 new cases this past week, pushing the total since October to 2,179.
Regional Context and Comparison
Dr. John Tuinema, associate medical officer of health for Algoma, said the recent rise in infections was anticipated. He noted that Algoma’s outbreak timeline lags behind the more heavily impacted Southwestern Ontario region, which began seeing cases several months earlier.
Still, Tuinema expressed optimism that the overall impact in northern Ontario will remain lower due to differences in population and vaccine coverage.
Vaccination Rates Offer Protection
High immunization rates in the region are helping to contain the virus’s spread. Algoma Public Health reports that 87% of seven-year-olds and 97% of 17-year-olds are fully vaccinated against measles.
“When we do have a case, it quickly hits that wall of herd immunity,” said Tuinema. He added that most recent cases have occurred in unvaccinated individuals and within private household settings, rather than in schools or public venues.
Southwestern Ontario Cases Begin to Decline
Meanwhile, Southwestern Ontario—considered the epicenter of the province’s outbreak—has seen a total of 751 measles cases. This week, the region recorded 12 new infections, continuing a downward trend over the past month.
Public health officials say the decline in new cases in the south, along with strong vaccination coverage in the north, are encouraging signs that the outbreak may be coming under control.
Ongoing Monitoring and Public Guidance
Public Health Ontario continues to monitor the situation across the province and urges residents to ensure their vaccinations are up to date. Measles, a highly contagious viral disease, can lead to severe complications, especially in children and the immunocompromised.
While the spread appears to be slowing in some areas, health officials warn that localized spikes—such as the one currently unfolding in Algoma—highlight the need for continued vigilance.
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