Serial measurements of lymphocyte subsets [CD3+, CD4+, CD8+, natural killer (NK) cells, and B cells] in preterm neonates with late-onset sepsis and infection-free controls showed higher percentages of NK and B cells in the sepsis group, while those of CD3+, CD4+, and CD8+ showed no differences (52). The gene discussed is CD4; the disease is Sepsis.