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 Grand Rounds: The Kids are Alright: Inspiring Learning Through Global Citizenship

This session will help attendees understand how digital technology can be used to provide timely, accurate and relevant immunization education in Ontario schools. 

See the Event Details
Chat icon

Contact the Department

Immunization and Vaccine-Preventable Diseases


contact lab

Contact Laboratory Customer Service

Laboratory Services


Updated 12 April 2019