title: New complexities arise as the epidemic "grays".
authors.forename: Tabitha
authors.initials: T
authors.lastname: Wells
mesh_terms: D000368:Aged; D002487:Centers for Disease Control and Prevention, U.S.; D015658:HIV Infections / Q000453:epidemiology*; D006801:Humans; D008875:Middle Aged; D014481:United States / Q000453:epidemiology