Human immunodeficiency virus type 1 Tat upregulates interleukin-2 secretion in activated T cells .
human immunodeficiency virus type 1 tat upregulates interleukin-2 secretion in activated t cells .
B-virus I-virus I-virus I-virus I-virus O O B-protein_molecule O O B-cell_type I-cell_type I-cell_type O