CD8A and pertussis: In the PT2 infants, central memory CD8T cells (CD300a MFI) increased 2.2 fold with pertussis and 1.02-fold, increased, central memory CD8 T cells (TNF-α MFI) and BCMA+ plasma cells raised 1.5-fold with HBsAg while central memory CD8 T cells (CD300a MFI) increased 2.33 fold for HiB.