title: Hepatitis B vaccination: how long does protection last?
mesh_terms: D006510:Hepatitis B Antibodies / Q000032:analysis*; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D017325:Hepatitis B Vaccines; D006801:Humans; D008297:Male; D013997:Time Factors; D014765:Viral Vaccines / Q000276:immunology*
chemical_list: D006510:Hepatitis B Antibodies; D006514:Hepatitis B Surface Antigens; D017325:Hepatitis B Vaccines; D014765:Viral Vaccines