27 Mermin Mermin J J Lule Lule J J Ekwaru Ekwaru JP JP  Effect of co-trimoxazole prophylaxis on morbidity, mortality, CD4-cell count, and viral load in HIV infection in rural Uganda  Effect of co-trimoxazole prophylaxis on morbidity, mortality, CD4-cell count, and viral load in HIV infection in rural Uganda  The Lancet  The Lancet  2004  2004 364 364 1428 1428 34 34. Here, CD4 is linked to HIV infectious disease.