Common chief complains were cough (99.88%), dyspnea (95.88%), fever (83.51%), poor suction (67.01%), and cyanosis (50.52%).
Triệu chứng cơ năng thường gặp là ho (95,88%), khó thở (95,88%), sốt (83,51), bú kém (67,01%), cơn tím (50,52%).