Fig. 5

Enriched CD4⁺ and CD8⁺ T cell responses to vaccination correspond to each other in healthy control persons but not lung transplantation recipients. The enriched memory T cell responses to vaccination from Figs. 2, 3 were analyzed for correlation of the CD4⁺ and CD8⁺ T cell subsets. By Spearman rank test, the lung transplantation group correlations were not significant (p = 0.12 and p = 0.40), while the correlation in the healthy control group was highly significant (p < 0.0001)