Table 4. Seroprevalence studies on HBV and HCV infection in Lao PDR.

Study	Population	Location	Number	Prevalence
				HBsAg	HCV-Ab
Nouanthong et al. (2021) [22]	Voluntary blood donors	Eight provinces	5,017	6.9%
Xaydalasouk et al (2021) [23]	Patients	Saravan province (three district hospitals and one provincial hospital)	2,463	3.8%
Mangkara et al. (2021) [24]	Dentists and dental workers	Vientiane capital	317	5.0%
Xaydalasouk et al (2018) [26]	Female factory workers	Vientiane capital	400	4% ± 1.9%	1.8% ± 1.3%
Evdokimov et al. (2017) [27]	Children (aged 9 to 50 months)	Vientiane, Khammouane, and Boulhikhamxay province	1,039	1.0%
	Mothers		1,039	7.0%
Choisy et al. (2017) [28]	Pregnant women attending the antenatal clinic	Vientiane capital (Mahosot hospital)	13,238	5.4% (95 CI: 5.1%–5.8%)
Jutavijittum et al. (2016) [29]	Pregnant women attending the antenatal clinic	Vientiane capital (Mother and Child Hospital)	3,000	5.8%
Komada et al. (2015) [30]	Children (5–9 years)	Central region	911	2.1% (95% CI: 0.8–3.4)
	Mothers (15–45 years)		911	4.1% (95% CI: 2.6–5.5)
Black et al. (2015) [31]	Healthcare workers	Vientiane capital, Huaphan and Boulhikhamxay provinces (three central, two provincial, and eight district hospitals)	1,128	8.0%	3.9%
Xeuatvongsa et al. (2014) [21]	Children (5–9 years)	Nationwide	965	1.7% (95% CI: 0.8%–2.6%)
	Mothers (15–45 years)		965	2.9% (95% CI: 1.7%–4.2%)
Black et al. (2014) [32]	Infants	Vientiane and Luang Prabang province	132	0.5%
	Preschool children	Huaphan province	132	4.5%
	School children	Luang Prabang, Bolikhamxai, and Savannaket province	1,689	7.9%
	Pregnant women	Luang Prabang and Vientiane province	388	8.2%
Jutavijittum et al. (2014) [33]	Blood donors	Vientiane capital, Vientiane and Bolikhamsay province	906	9.6%
Jutavijittum et al. (2007) [19]	Blood donors	Vientiane capital, Vientiane and Bolikhamsay province	13,897	8.7%	1.1%

HBC, hepatitis B; HCV, hepatitis C; PDR, People’s Democratic Republic.