The incidence of opportunistic infections per 100 PYO was found to be higher in children with anemia (24.75), those with a CD4 cell count below the threshold (18.71), those who reported never taking CPT (16.82) or TPT (15.76), and those who ever exhibited fair or poor adherence to ART (18.94) (Table 6). Here, CD4 is linked to anemia (phenotype).