CXCR2 and congenital rubella syndrome: Interestingly, there were no age-related differences in peripheral blood neutrophil counts and chemokine levels in subjects with CRS with NP (Figs 2D and 3A–3E), but age-related difference exists in the expression of CXCR2 in NE-NP, but not in E-NP (Fig 3F and 3G).