Effects of PPRV infection on circulating immune cells. Goats were infected with different PPRV isolates as described in the text. Whole blood was taken from infected animals at the indicated days post infection and was stained with monoclonal anti-CD4, anti-CD8 and anti-CD14 monoclonal antibodies. Results are expressed as the mean ± SD of the percentage of total lymphocytes that were (A) CD14+, (B) CD4+ or (A) CD8+ cells in peripheral blood. * = p < 0.01 (not different from day zero).