Table 2. Comparisons of the period of viral shedding in the general, hospitalized and immunocompromised populations.

	General Population					Hospitalized	Immunocompromised
Authors	Cowling et al.	Hien et al.	De Serres et al.	Fleury et al.	Witkop et al.	Cao et al.	Seville et al.	CDC	Ours
Reference	[31]	[33]	[34]	[25]	[22]	[23]	[32]	[21]
General population	Households, Hong Kong	Containment of the pandemics in Ho Chi Minh City (HCMC), Vietnam	Households, Canada	Travelers, France	Military cadets	First 426 patients hospitalized in China	No	No	No
Immunocompromised	ND	ND	ND	No	ND	ND	Yes	Yes	Yes
Underlying disease	ND	ND	ND	No	ND	Various	Transplant recipients	Leukemia	Cancer
Number of patients evaluated for virus shedding	54	932	43	2	29	350	6	2	10
Number of patients with virus shedding ≥7 days	2 children	∼80	8–14b	2	7	238	1	2	5
Highest period of shedding (days)	8	11–12a	8–11b	14–28c	9	17	11	37–44c	63

^a– Five to six days for children under nine years old.

^b– Eight patients shed the virus for at least 8 days, while 14 shed for at least 11 days.

^c– Only two patients were evaluated.

ND – Not determined.