Table 2.

Duration of viable virus shedding and PCR positivity of the SARS-CoV-2 Omicron variant in patients with different characteristics.

Study	Outcome variable	Characteristics of patients	Sample Size	Mean duration (95% confidence interval)
Shen et al [27]	Duration of PCR positivity	Symptomatic	39	12.25 (10.99-13.51)
		Asymptomatic	37	9.95 (8.69-11.20)
Wang et al [31]	Duration of PCR positivity	Symptomatic	257	11.70 (11.26-12.14)
		Asymptomatic	119	11.70(11.00-12.40)
Takahashi et al [28]	Duration of viable virus shedding	Symptomatic	8	6.25(4.98-7.52)
		Asymptomatic	2	5.00(5.00-5.00)
Bouton et al [11]	Duration of viable virus shedding	Fully vaccinated by two doses	44	3.00(2.09-3.91)
		Vaccinated with a third booster dose	41	2.67(1.96-3.37)
Shen et al [27]	Duration of PCR positivity	Unvaccinated	12	13.05 (11.34-14.76)
		Fully vaccinated by two doses	36	10.46 (9.07-11.85)
		Vaccinated with a third booster dose	27	11.13 (9.48-12.79)
Zeng et al. [35]	Duration of PCR positivity	Full inactivated vaccination	355	17.00 (16.23-17.77)
		Full recombinant vaccination	14	21.53 (17.87-25.20)
		Partial vaccination	11	16.67 (8.65-24.69)
Ma et al. [22]	Duration of PCR positivity	Unvaccinated	3	11.05 (5.19-16.90)
		Vaccinated	11	11.67 (7.16-16.18)
Hua et al. [13]	Duration of PCR positivity	Unvaccinated	22	10.67 (9.01-12.32)
		Fully vaccinated	64	10.33 (9.78-10.89)
		Booster vaccination	139	11.00 (10.50-11.50)
Chen et al. [12]	Duration of PCR positivity	Fully vaccinated or booster	339	10.00 (9.52-10.48)
		Not fully vaccinated	268	14.33 (13.71-14.96)

PCR, polymerase chain reaction.