title: May sheep safely graze?
authors.forename: Stanley M
authors.initials: SM
authors.lastname: Aronson
mesh_terms: D000818:Animals; D004474:Ecthyma, Contagious / Q000276:immunology / Q000821:virology*; D005260:Female; D015658:HIV Infections / Q000266:history / Q000276:immunology; D049673:History, 20th Century; D006801:Humans; D008875:Middle Aged; D009923:Orf virus / Q000472:pathogenicity; D012756:Sheep; D013045:Species Specificity