In Vivo: Firivumab (CT-P22; CT120; 7.5-30 mg/kg; IP; Twenty-four hours post-infection) shows 100% protection against H1N1 virus in >15 mg/kg-treated group and 70% in 7.5 mg/kg-treated group. CT-P27 (adding 7.5 mg/kg Firivumab and 7.5 mg/kg CT149) shows full protection in A/California/04/09 (H1N1)-treated mice.