Table 3. Initial therapies during hospitalization in patients with positive and negative history of influenza vaccination .

supplementary treatments	Influanza-Vaccine (positive) (n=59)	Influanza-Vaccine (negative) (n=470)	p
Azithromycin	22 (37.3%)	158 (33.6%)	0.576
Heparin (1=yes)	44 (74.6%)	348 (74%)	0.930
Lopinavir_and ritonavir	40 (67.8%)	326 (69.4%)	0.807
Linezolid	18 (30.5%)	97 (20.6%)	0.123
Hydroxyl chloroquin	53 (89.8%)	413 (87.9%)	0.662