title: The ghosts of Christmas past. How would those we've lost guide us today?
authors.affiliation: Division of Infectious Disease, William C. Gorgas Center for Geographic Medicine, University of Alabama at Birmingham, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Saag
mesh_terms: D015658:HIV Infections / Q000276:immunology; D006801:Humans; D013601:T-Lymphocytes / Q000276:immunology