Public health officials point to recent measles cases in Ontario to underscore the case for an electronic vaccination registry

The sharp increase in measles cases in Ontario – including another 89 last week – underscores the urgent need for an electronic system to record vaccinations, public health experts say.According to new data released by Public Health Ontario on Thursday, Ontario recorded a total of 661 measles cases (520 confirmed, 121 probable) associated with an outbreak in 13 public health units between Oct. 18 of last year and April 2, 2025.The majority of cases have been among unimmunized individuals in the Southwestern Public Health and Grand Erie Public Health units. In its own measles report released Thursday, Southwestern said it had recorded 18 cases in the past seven days and 306 since last October.