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Model-based estimates of immune function and self-rated health trajectories by social network size. Small network size is depicted in blue (12 social ties, i.e., 1 SD below the mean), and large network size is shown in red (28 social ties, i.e., 1 SD above the mean). Con A = Concanavalin A; PHA = phytohemagglutinin. See Supplemental Figure S2 for plots with standard error bands.
