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.
PHO Rounds: Updates on Influenza, COVID-19, and RSV for the 2023-24 Season
This session will provide an overview of respiratory virus activity in Ontario and Canada during the 2022-23 season and the southern hemisphere’s 2023 season.