Canada’s restrictions on international travel drastically reduced the number of COVID-19 cases entering the country during the first waves of the pandemic but were insufficient to prevent new outbreaks, according to a new study led by University of British Columbia researchers. The study, published today in eLife, used publicly available viral genome sequences to create a detailed timeline of how the virus was entering Canada from January 2020 to March 2021, and the resulting chains of transmission. The genomic data was used to identify the geographic origin of COVID-19 cases, enabling the identification of 2,263 instances where COVID-19 was imported into Read more
