Frequency of CD8
T cells specific for Flu-MP* peptide determined by tetramer staining. (A) Representative flow cytometry dot plot from one HLA-A*0201+ chagasic patient. (B) Frequency of HLA-A*0201+ chagasic patients (white bars) and HLA-A*0201+ healthy donors (grey bars). There were no statistically significant differences between healthy donors and chagasic patients P = 0.21.