title: Vaccinia virus peritoneal infection in rats of different ages.
mesh_terms: D000367:Age Factors; D000818:Animals; D005455:Fluorescent Antibody Technique; D007109:Immunity; D008214:Lymphocytes; D008264:Macrophages; D009504:Neutrophils; D010537:Peritoneum / Q000166:cytology / Q000276:immunology*; D051381:Rats; D014615:Vaccinia / Q000209:etiology / Q000276:immunology; D014616:Vaccinia virus / Q000302:isolation & purification