Fig. 1

Gating strategy and NK cell frequencies in HUU, HEUMT and HEULT children. A: Gating strategy for selecting viable CD3-CD14-CD19- (lineage negative) single NK cells based on the expression of CD56 and CD16. B: The frequencies of total NK cells among viable peripheral blood lymphocytes and subsets (CD56^bright and CD56^dim NK cells). Only CD56^dim NK cell frequencies maintained significance after controlling for age and preterm birth. *=p < 0.01, **= p < 0.001. Abbreviations: HEU: HIV-exposed uninfected, HUU: HIV-unexposed uninfected, LT: long term, MT: medium term, NK: natural killer