The second subset (Prelim_PB2) was proliferative, with MKI67 expression; however, within group Prelim_PB2, MKI67 was expressed only in adults with COVID-19 and children with dengue, but not in adults with dengue and children with COVID-19 (Supplemental Figure 2G, red box). The gene discussed is MKI67; the disease is dengue disease.