Antiviral Activity of Beebread, Bee-Collected Pollen and Artificially Fermented Pollen against Influenza A Virus oleh Tilemachos G. Dimitriou, Nikos Asoutis Didaras, Christina Barda, Dimitra Skopeliti, Katerina Kontogianni, Katerina Karatasou, Helen Skaltsa, Dimitris Mossialos