Article content The agency tracked cases from the outset of Ontario’s vaccination program on Dec. 14 up to July 10, and found that of the more than 10 million Ontarians who had received at least one vaccine dose, only 16,358 (0.16 per cent of cases) became infected when they were partially vaccinated, and 1,765 (0.02 per cent) became infected when they were fully vaccinated. We apologize, but this video has failed to load. Try refreshing your browser. COVID-19: Provincial data show unvaccinated account for overwhelming majority of cases Back to video The trend was visible in Ottawa: During the period from Dec. 14 to July 10, there were only 65 symptomatic breakthrough cases and 127 asymptomatic breakthrough cases in fully vaccinated people in the capital, representing, in both instances, less than one per cent of all cases during the period.