In contrast, neither the ANC on day 7 (OR = 0.999, 95% CI: 0.994–1.004) nor the IL-6 level (OR = 1.001, 95% CI: 0.998–1.003) demonstrated statistically significant predictive value for CRS grade (all P > 0.05). The gene discussed is IL6; the disease is congenital rubella syndrome.