title: Letter to the editor.
authors.affiliation: Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO, USA. Electronic address: ian.orme@colostate.edu.
authors.forename: Ian
authors.initials: I
authors.lastname: Orme
mesh_terms: D000818:Animals; D006801:Humans; D009169:Mycobacterium tuberculosis / Q000276:immunology*; D014376:Tuberculosis / Q000517:prevention & control*; D032581:Tuberculosis Vaccines / Q000494:pharmacology*
chemical_list: D032581:Tuberculosis Vaccines