The logistic regression equation for predicting RSV-associated SALRTI was as follows: Logit (P) = −3.376 − 0.268 × Age (month) + 0.642 × Preterm birth (yes) + 0.744 × Underlying condition (yes) + 0.813 × Seizures (yes) + 0.366 × NLR + 0.130 × IL-6 (pg/mL) + 0.007 × LDH (U/L) + 1.086 × D-dimer (mg/L) + 0.434 × Co-infection (yes). Here, IL6 is linked to coinfection.