Susceptibility to diphtheria among elderly persons; immunization by the intracutaneous administration of toxoid.
D000368:Aged; D004165:Diphtheria / Q000517:prevention & control*; D004194:Disease; D006801:Humans; D007114:Immunization; D014121:Toxoids; D014611:Vaccination
D014121:Toxoids
AGED/diseases; DIPHTHERIA/prevention and control