Diphtheria is a serious infection caused by the bacteria Corynebacterium diphtheriae. It is rare in Ontario. It is spread from person-to-person through coughing or sneezing or can be spread indirectly by touching contaminated objects. Symptoms include, fever, sore throat, difficulty swallowing, malaise and loss of appetite. In Ontario, a vaccine series to prevent diphtheria is started in infancy with booster doses throughout life.
To obtain or inquire about an immunization record, or for general immunization information, please contact your local public health unit.
Diphtheria Data at a Glance
View detailed data: Infectious Disease Trends in Ontario