Officials with the Thunder Bay and District Health Unit are encouraging everyone to get up-to-date whooping cough vaccines.
Health Unit officials say there have been four confirmed cases in the district since August.
The vaccine is free to everyone in Ontario, and a booster shot may be required for people aged 19- to 64-years-old.
Appointments for the immunization can be made my contacting the Health Unit.
(CKPR Radio)
