title: AIDS: an update on what we know now.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000451:nursing* / Q000635:transmission; D003020:Clothing; D003428:Cross Infection / Q000517:prevention & control*; D006801:Humans; D009723:Nurse-Patient Relations; D009784:Occupational Diseases / Q000517:prevention & control*