CD4 and parasitic infectious disease: Following diagnosis of G. lamblia infection, we found a non-statistically significant decrease in cluster of differentiation 4 (CD4) (mean 61.38 cells/mm3 decrease, 95% CI: −25.79, 148.6, p = 0.15) and platelets (mean 13.6 × 106/mL decrease, 95% CI: −48.38, 75.58, p = 0.63) in patients compared to the values obtained before diagnosis of the parasitic infection, as shown in Figure 1A,B.