title: Letter: Sleeping sickness.
mesh_terms: D001770:Blood Bactericidal Activity; D004992:Ethics, Medical; D006805:Human Experimentation; D006801:Humans; D014345:Trypanosoma / Q000472:pathogenicity*; D014346:Trypanosoma brucei brucei / Q000145:classification / Q000472:pathogenicity; D014353:Trypanosomiasis, African / Q000097:blood / Q000276:immunology*