Vaccination With Viral Vectors Expressing Chimeric Hemagglutinin, NP and M1 Antigens Protects Ferrets Against Influenza Virus Challenge by McMahon, M, Asthagiri Arunkumar, G, Liu, W-C, Stadlbauer, D, Albrecht, RA, Pavot, V, Aramouni, M, Lambe, T, Gilbert, SC, Krammer, F