Toronto maybe the third most vulnerable city in North America to disease exposure acording to a Toronto Star article.
Pearson International Airport sees more than 32 Million passengers a year with direct international flights accounting for more than 10 million passengers. The potential of bringing disease along with the passengers is signficant.
Read the article at: http://www.healthzone.ca/health/newsfeatures/article/722788--pearson-airport-flu-magnet?bn=1