Yellow fever is a mosquito-borne, viral infection, found in the tropical and subtropical areas of Africa and Central and South America. The virus is transmitted by the Aedes mosquito species, which are currently not established in Canada. All cases of yellow fever in Ontario are travel-related, and there is no human-to-human transmission. A vaccine is available to prevent the disease.
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.