title: HIV-1 variants: yet another challenge to public health.
authors.affiliation: Division of HIV/AIDS, Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia.
authors.forename: T J
authors.initials: TJ
authors.lastname: Dondero
authors.forename: D J
authors.initials: DJ
authors.lastname: Hu
authors.forename: J R
authors.initials: JR
authors.lastname: George
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000382:microbiology*; D000368:Aged; D004797:Enzyme-Linked Immunosorbent Assay; D018023:HIV Seronegativity; D015497:HIV-1 / Q000145:classification* / Q000302:isolation & purification; D006801:Humans; D008875:Middle Aged; D012680:Sensitivity and Specificity