In logistic regression modeling controlling for seasonal allergies, eosinophilia was associated with both schistosomiasis (OR = 4.5; 95% CI: 1.1–19.0) and low CD4+ cell counts (OR = 4.2; 95% CI: 1.0–17), although having a detectable HIV VL was not significantly associated. The gene discussed is CD4; the disease is Allergy.