CMV viral loads per mL as a function of children's ages in months. Panel A shows results for saliva viral loads, and panel B shows results for urine viral loads. Circles are only plotted for children who were shedding; negative results (i.e., below the limit of detection) are not plotted. Blue circles represent saliva results, and yellow circles represent urine results. The regression line in Panel A is log10 (CMV viral load) =6.9-0.095 (age in months), with r2 = 0.39 and P < 0.001; the regression line in Panel B is log10 (CMV viral load) =4.9-0.012 (age in months), with r2 = 0.05 and P = 0.003.