The present study was conducted in a Chinese Han population. A cohort of 12 healthy adults was voluntarily recruited from the community health service center of Dalang, Dongguan (Table 4).The HB vaccine (20 μg) was administered via intramuscular injection of the deltoid according to a 0-, 1-, and 6-month standard schedule (recombinant hepatitis B vaccine, Engerix-B, GlaxoSmithKline, Brentford, UK) [30 (link)].None of the subjects had a history of infection with HBV, hepatitis C virus or human immunodeficiency virus, and none were immunodeficient. There were no smokers among the study subjects. We administered a booster HB vaccine via intramuscular injection in the upper arm deltoid and collected 25 mL peripheral venous blood at baseline before and after vaccination on days 7 and 14.

Demographic characteristics of study cohort

N12
Gender (M/F)6/6
Age (years)28.83 ± 3.95
BMI21.81 ± 3.54
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