CD8A and peripheral arterial disease: Overall, for delta variant, the median fold‐change was 0.90 (interquartile range 0.67–1.25) for HC and 0.93 (interquartile range 0.43–1.92) for PAD in CD4+ T cells, and 0.74 (interquartile range 0.32–1.64) for HC and 0.92 (interquartile range 0.23–1.73) for PAD in CD8+ T cells.