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: International Border Surveillance Study
Arriving international passengers at Toronto’s Pearson International Airport were enrolled in a prospective study of COVID-19 risk upon arrival and during quarantine in September and October 2020.