COVID-19 international border surveillance at Toronto’s Pearson Airport: a cohort study

Autor: Laura C Rosella, Marek Smieja, Eric De Prophetis, Vivek Goel, Dominik Mertz, David Bulir, Munaza Jamil, Cheryl Regehr
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: BMJ Open, Vol 11, Iss 7 (2021)
Druh dokumentu: article
ISSN: 2021-0507
2044-6055
DOI: 10.1136/bmjopen-2021-050714
Popis: Objectives The primary objective was to estimate the positivity rate of air travellers coming to Toronto, Canada in September and October 2020, on arrival and on day 7 and day 14. The secondary objectives were to estimate the degree of risk based on country of origin and to assess knowledge and attitudes towards COVID-19 control measures and subjective well-being during the quarantine period.Design Prospective cohort of arriving international travellers.Setting Toronto Pearson Airport Terminal 1, Toronto, Canada.Participants Participants of this study were passengers arriving on international flights. Inclusion criteria were those aged 18 or older who had a final destination within 100 km of the airport, spoke English or French, and provided consent. Excluded were those taking a connecting flight, had no internet access, exhibited symptoms of COVID-19 on arrival or were exempted from quarantine.Main outcome measures Positive for SARS-CoV-2 virus on reverse transcription PCR with self-administered oral-nasal swab and general well-being using the WHO-5 Well-being Index.Results Of 16 361 passengers enrolled, 248 (1.5%, 95% CI 1.3% to 1.7%) tested positive. Of these, 167 (67%) were identified on arrival, 67 (27%) on day 7, and 14 (6%) on day 14. The positivity rate increased from 1% in September to 2% in October. Average well-being score declined from 19.8 (out of a maximum of 25) to 15.5 between arrival and day 7 (p
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