title: I often read in HealthNews that elderly people are especially susceptible to severe cases of infectious diseases. Why is this so?
authors.forename: A W
authors.initials: AW
authors.lastname: Feinberg
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000276:immunology*; D003141:Communicable Diseases; D006801:Humans