Antibodies against human influenza viruses in sentinel duck flocks in the ornithological reserve Kopački rit in Croatia

(Ljubo Barbić, Nenad Turk, Željko Župančić, Snježana Kovač, Zvonko Stojević, Vladimir Draženović, Zoran Milas, Vilim Starešina, and Josip Madić)

Protutijela za viruse humane influence u prokazivačkih pataka u ornitološkom rezervatu Kopački rit