COVID-19 international border surveillance at Toronto's Pearson Airport: a cohort study.
Vivek GoelDavid BulirEric De ProphetisMunaza JamilLaura C RosellaDominik MertzCheryl RegehrMarek SmiejaPublished in: BMJ open (2021)
A single arrival test will pick up two-thirds of individuals who will become positive by day 14, with most of the rest detected on the second test on day 7. These results support strategies identified through mathematical models that a reduced quarantine combined with testing can be as effective as a 14-day quarantine.