Table 2.

Parameter estimates for COVID-19 in Ontario, Canada.

Parameter		Definitions	Mean (Std)	Source
$c_0$		Contact rate before March 14	11.5801 (0.3456)	Estimated
$c_1$		Contact rate between March 14 to March 18	10.1202 (0.9185)	Estimated
$c_2$		Contact rate between March 18 to March 24	8.0495 (0.2787)	Estimated
$c\left(t\right)$	$c_2$	Constant contact rate at March 24	8.0495 (0.2787)	Estimated
	$r_1$	Exponential decrease in contact rate	0.0466 (0.0152)	Estimated
	$c_b$	Minimum contact rate after March 24	2.1987 (0.2400)	Estimated
$\beta$		Probability of transmission per contact	0.1469 (0.0023)	Estimated
$q_0$		Fraction of quarantined exposed individuals before March 24	0.1145 (0.0114)	Estimated
$q\left(t\right)$	$q_0$	Quarantine fraction at March 24	0.1145 (0.0114)	Estimated
	$r_2$	Exponential increase in quarantine fraction	0.1230 (0.0123)	Estimated
	$q_b$	The maximum quarantine fraction	0.3721 (0.0371)	Estimated
$\sigma$		Transition rate of exposed individuals to the infected class	1/5	[9]
$\lambda$		Rate at which the quarantined uninfected contacts were released into the wider community	1/14	[7]
$\varrho$		Probability of having symptoms among infected individuals	0.7036 (0.0261)	Estimated
${\delta }_I$		Transition rate of symptomatic infected individuals to the quarantined infected class	0.1344 (0.0134)	Estimated
${\delta }_q$		Transition rate of quarantined exposed individuals to the quarantined infected class	0.1237 (0.0086)	Estimated
${\gamma }_I$		Recovery rate of symptomatic infected individuals	0.1957 (0.0111)	Estimated
${\gamma }_A$		Recovery rate of asymptomatic infected individuals	0.139	[7]
${\gamma }_D$		Recovery rate of quarantined diagnosed individuals	0.2	[8]
$\alpha$		Disease-induced death rate	0.008	[8]
$\theta$		Modification factor of asymptomatic infectiousness	0.0275 (0.0128)	Estimated
Initial values		Definitions	Mean (Std)	Source
$S\left(0\right)$		Initial susceptible population	$1.471\times {10}^7$	Data
$E\left(0\right)$		Initial exposed population	8.9743 (0.6558)	Estimated
$I\left(0\right)$		Initial symptomatic infected population	5.3887 (0.9442)	Estimated
$A\left(0\right)$		Initial asymptomatic infected population	19.4186 (3.9406)	Estimated
$S_q\left(0\right)$		Initial quarantined susceptible population	0	Data
$E_q\left(0\right)$		Initial quarantined exposed population	0	Data
$D\left(0\right)$		Initial quarantined diagnosed population	5	Data
$R\left(0\right)$		Initial recovered population	0	Data