Table 1.

A list of several studies along with sample size, mean and lognormal parameters $\mu$, $\sigma$.

Author	Data size	Mean (days)	$\mu$	$\sigma$
Backer et al.2	88	6.4	1.796	0.349
Lauer et al.3	181	5.5	1.621	0.418
Li et al.4	10	5.2	1.425	0.669
Bi et al.5	183	4.8	1.570	0.650
Jiang et al.6	40	4.9	1.530	0.464
Linton et al.7	158	5.6	1.611	0.472
Zhang et al.8	49	5.2	1.540	0.470
Ma et al.9	587	7.4	1.857	0.547
Leung et al.10	61	7.2	1.780	0.680
McAloon et al.11	Meta	5.8	1.63	0.50
Jing et al.12	1084	8.29
Math model (raw data)	211,735	6.89
Math model (lognormal)	211,735	6.7	1.788	0.520
Math model (raw data)	2587	7.17
Math model (lognormal)	2587	7.0	1.827	0.528