Table 1.

Parameter values used in a COVID-19 importation risk model to Canada

Parameters	Symbol	Distribution	Values	References
Time spent in non-Canadian country (days) for Canadian travellers	$t_c$	Νormal (mean, SD)	mean = 15, SD = 2	[25]
Time spent in non-Canadian country (days) for Foreign travellers		NA	Time since beginning of pandemic to date of travel to Canada	Assumed
Latent period (days)	NA	Νormal (mean, SD)	mean = 3.5, SD = 1	[35–37]
Infectious period (days)	NA	Νormal (mean, SD)	mean = 12, SD = 4	[35–37]
Time between pre-departure molecular test and travel to Canada (days)	$\mathrm{\mu }$	Fixed value	3	Assumed
Sensitivity (%)	$\mathit{Se}$	Fixed value	60	[38]
Vaccine effectiveness	$\mathit{Ve}$	Νormal (mean, SD)	mean = See Table A2 SD = 0.015	See Table A2