Figure 1.

Immunoglobulin G concentrations, by age, against measles, mumps, rubella, and varicella among individuals aged 0–24 months. Red markers represent individuals with maternal antibodies who did not seroconvert, and blue markers represent individuals who seroconverted. Dots represent individuals in the orthodox Protestant community, and pluses represent individuals in the general population. Grey horizontal lines indicate the diagnostic cutoffs below which individuals are susceptible to infection. Black lines represent the fitted model for antibody kinetics; with the dashed line indicating age-specific antibody level for orthodox Protestant individuals, and the solid lines indicating the age-speciic antibody level for individuals from the general population, respectively. The inset shows a wider age range; the grey dots are female participants who are not included in the analysis.