Figure 4.

Correlation analysis of the proportion showing positive pp65-specific CD8⁺ T cell responses in each human leukocyte antigen (HLA) allotype with the frequencies of HLA class I alleles known in the Korean population. In the 50 donors included in this study (Table 1), in total 32 allotypes of HLA class I (7 HLA-A, 14 HLA-B, and 11 HLA-C) found. The proportions showing positive CD8⁺ T cell responses in donors with a specific allotype are presented in Figure 3. HLA allele frequencies in the Korean population have been quoted (22). P and R values calculated by Pearson’s correlation analysis.