A local medical officer of health who's dealing with a massive measles outbreak in southwestern Ontario cautions against associating the spread of the illness with a single demographic. Southwestern Public Health Unit's Dr. Ninh Tran says measles is an "equal opportunity" virus for the unvaccinated. His comments come as the region, which encompasses St. Thomas and Woodstock, reports 34 new cases over the past week, for a total of 296 since the outbreak began in October. The Canadian Press has prepared a graphic looking at the annual number of cases in Ontario since 2013. This graphic accompanies the story slugged Ont-Measles-Outbreak