Review
Copyright ©The Author(s) 2022.
World J Gastroenterol. Jul 21, 2022; 28(27): 3282-3296
Published online Jul 21, 2022. doi: 10.3748/wjg.v28.i27.3282
Table 1 Prevalence of hepatitis B surface antigen

Low prevalence area (< 2%)
Area of medium prevalence (2%-7%)
Area of high prevalence (> 8%)
Geographical areasUnited states, Canada, and Western European countriesParts of Russia, border Eurasian, and Asian-African areasAsia, sub-Saharan Africa, South, and Central America
% of the world population12%43%45%