title: Threat to employees from mystery illness is unclear.
mesh_terms: D002140:California; D002487:Centers for Disease Control and Prevention, U.S.; D003428:Cross Infection / Q000209:etiology*; D006716:Homosexuality; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000635:transmission*; D008297:Male; D009519:New York City; D010564:Personnel, Hospital; D014481:United States