[Cellular interactions in immune responses].
D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D002450:Cell Communication; D006801:Humans; D007109:Immunity; D007694:Killer Cells, Natural / Q000276:immunology; D008213:Lymphocyte Activation; D008264:Macrophages / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology