The variance explained by maternal and technical factors on each individual outcome points to race/ethnicity, insurance status, and COVID-19 vaccination status as potential drivers of the percentage of Th17 in the CD4+ population, and implicates race/ethnicity, maternal age, BMI, and SARS-CoV-2 infection status as potential drivers of the percentage of Treg cells in the CD4+ population (Figure 1D). This evidence concerns the gene CD4 and COVID-19.