title: Immunological changes in animals exposed to low sulphur dioxide concentrations.
mesh_terms: D000397:Air Pollution; D000818:Animals; D007118:Immunoassay; D007166:Immunosuppressive Agents; D008297:Male; D011817:Rabbits; D013296:Streptococcus pneumoniae / Q000276:immunology; D013458:Sulfur Dioxide / Q000633:toxicity*; D014611:Vaccination
chemical_list: D007166:Immunosuppressive Agents; D013458:Sulfur Dioxide