In the identical study, it was shown that eosinophil counts and rates were significantly and inversely correlated with markers of infection; That is, as C-reactive protein (CRP), procalcitonin (PRO), and ferritin (FER) increased, eosinophil levels decreased and the progressive reduction in eosinophil counts and rates worsened the viral infection (22). Here, CRP is linked to viral infectious disease.