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Incidence of diseases preventable by routine childhood immunization
As explained on the Vaccine Coverage page, the Ontario Immunization of School Pupils Act states that children attending school in Ontario must be vaccinated against diphtheria, measles, mumps, poliomyelitis, rubella and tetanus, or have a valid exemption. Exemptions may be for rare medical reasons identified by a physician or a personal decision notarized by a Commissioner of Oaths. For more information on these diseases, see the health unit fact sheets. For more information on the Ontario Immunization Schedule and/or how to get vaccinated, see the health unit website on immunization. For more local vaccine statistics, see the HealthSTATS pages on immunization. Figure 1 shows the number of cases of diseases preventable by routine childhood immunization in Simcoe Muskoka between 2000 and 2010. There are many factors that influence how many cases are reported to the health unit, as explained on the Infectious Diseases page. Among these diseases, pertussis (whooping cough) has the highest incidence in Simcoe Muskoka and Ontario because the immune protection for this vaccine decreases over time. For this reason, adults are now recommended to have another dose of “TDaP” vaccine, which protects against tetanus, diphtheria and pertussis. For more information on recommendations for adult immunization, see the health unit website on adult immunization.