Hepatitis B virus: a public health problem in Venezuela.
D000293:Adolescent; D000328:Adult; D002648:Child; D006509:Hepatitis B / Q000453:epidemiology / Q000517:prevention & control*; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D011634:Public Health; D012306:Risk; D014687:Venezuela; D014761:Viral Hepatitis Vaccines
D014761:Viral Hepatitis Vaccines