March 2025:

There has been an increase in measles cases in southwestern Ontario linking back to an
exposure at a large gathering with guests from Mennonite communities in New
Brunswick last fall. As of February 26, 2025, there were 177 cases of measles reported
in Ontario related to this outbreak predominantly in Grand Erie and Southwestern public
health units. Additionally, exposures and subsequent cases have been reported in
Manitoba from family visits in Ontario.
Over 90% of cases in Ontario linked to this outbreak are among unimmunized
individuals. Cases could spread in any unvaccinated community or population but are
disproportionately affecting some Mennonite, Amish, and other Anabaptist communities
due to a combination of under-immunization and exposure to measles in certain areas.

Along with routine immunizations, the following is advised for individuals who live,
work, travel (e.g., family visit), worship, or spend time in affected regions and
communities with measles cases and where the risk of exposure is higher. This
currently includes the Grand Erie and Southwestern local public health agencies and
will continue to be reassessed as needed:

• Infants (six to 11 months): Should receive one dose of the measles, mumps,
  rubella (MMR) vaccine. Two additional doses continue to be recommended after
  the age of one year.
• Children (one to four years): Children who have received their first dose of
  measles-containing vaccine are encouraged to receive a second dose as soon
  as possible (at a minimum of four weeks from the first dose).
• Adults (18+ years) born on or after 1970: A second dose of MMR vaccine is
  recommended.

Walk-in Injection hours for MMR:

• Monday 9:30 – 11:30am, 1:30 – 3:30pm
• Tuesday 9:30 – 11:30am
• Wednesday 9:00 – 11:30am, 1:30 – 3:30pm
• Thursday 9:00 – 11:30am
• Friday 9:00 – 11:30am