Hepatitis-B vaccination in the elderly.
D000368:Aged; D005260:Female; D006509:Hepatitis B / Q000517:prevention & control*; D006510:Hepatitis B Antibodies / Q000096:biosynthesis*; D017325:Hepatitis B Vaccines; D006801:Humans; D008297:Male; D008875:Middle Aged; D014611:Vaccination; D014765:Viral Vaccines / Q000276:immunology*
D006510:Hepatitis B Antibodies; D017325:Hepatitis B Vaccines; D014765:Viral Vaccines