Hepatitis B is spreading.
D002648:Child; D002675:Child, Preschool; D006509:Hepatitis B / Q000453:epidemiology* / Q000517:prevention & control; D017325:Hepatitis B Vaccines; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D014761:Viral Hepatitis Vaccines
D017325:Hepatitis B Vaccines; D014761:Viral Hepatitis Vaccines