r: 3 (3.75%).
9 kinds of respiratory pathogens and influenza A/B nucleic acids: all patients.
CT: abnormal: 55 (68.75%), bilateral pneumonia: 36 (45.00%), unilateral pneumonia: 19 (23.75%), normal: 25 (31.25%).
Organ damage: acute respiratory injury: 10 (12.50%),