Fig. (3) Effect of RSV on neutrophil apoptosis in plasma: Percoll purified cells at 4 (A), 8 (B), 12 (C) and 24 (D) hours post infection. Data are presented as mean values, with error bars indicating the standard error, of 5 independent experiments on independent donors. Levels of significance are shown as *, p<0.05; **, p<0.01.