The clinical analysis and indications for exchange transfusion in 158 children with pertussis characterized by marked leukocytosis
Ital J Pediatr. 2025 Jul 15;51(1):224. doi: 10.1186/s13052-025-02077-6. ABSTRACT BACKGROUND: Hyperleukocytosis (WBC ≥ 30 × 10⁹/L) strongly associated with fatal outcomes; evidence-based thresholds for initiating …