Kinetic of EBV-induced apoptosis in human neutrophils. Neutrophils were incubated with or without EBV for increasing periods of time at 37°C. Cells were obtained and DNA was stained as described in Materials and Methods. The results presented in this figure represent the mean ± SD of experiments performed in triplicate on neutrophils from four individuals. ^*Significantly different from unstimulated control value at P < .05;^**significantly different from unstimulated control value at P < .01.