https://www.selleckchem.com/pr....oducts/pluronic-f-68
ther systematic experiments to investigate on potential confounders that could clarify how much reopening schools mattered. 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. Prospective cohort of arriv
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