In humans infected with the HIV-1 virus there may be a disproportionate severity of signs and symptoms of illness compared to the fraction of CD4+ infected T-lymphoid cells .
in humans infected with the hiv-1 virus there may be a disproportionate severity of signs and symptoms of illness compared to the fraction of cd4+ infected t-lymphoid cells .
O O O O O B-virus I-virus O O O O O O O O O O O O O O O O O B-cell_line I-cell_line I-cell_line I-cell_line O