Purified CD4⁺ and CD8⁺ T cells rescue 34-1-2 mAb-induced lung damage. Wet-to-dry ratios of the lungs from control SCID mice receiving nothing (Ab⁻) or in SCID mice 2 hours after being injected with 2.3 mg/kg 34-1-2s alone (Ab⁺) or in SCID mice receiving antibody (Ab⁺) and a transfer of either 2 × 10⁷ splenocytes depleted of both CD4⁺ and CD8⁺ T cells (CD4⁻CD8⁻) or purified CD19⁺ B cells, CD4⁺ T cells, or CD8⁺ T cells. Numbers above the x-axis refer to the number of mice in each group studied.