CRP and susceptibility to pneumonia measurement: In all 7 RV-positive children with pneumonia the biomarkers for bacterial infection were markedly increased: the median (range) of highest values for WBC was 18.0 (10.3–25.7) × 109/L, for CRP 290 (190–345) mg/L, and for PCT 6.61 (1.99–25.73) μg/L.