About the Authors

Violetta Sączyńska

saczynskav@iba.waw.pl

Affiliation Institute of Biotechnology and Antibiotics, Warsaw, Poland

Agnieszka Romanik

Affiliation Institute of Biotechnology and Antibiotics, Warsaw, Poland

Katarzyna Florys

Affiliation Institute of Biotechnology and Antibiotics, Warsaw, Poland

Violetta Cecuda-Adamczewska

Affiliation Institute of Biotechnology and Antibiotics, Warsaw, Poland

Małgorzata Kęsik-Brodacka

Affiliation Institute of Biotechnology and Antibiotics, Warsaw, Poland

Krzysztof Śmietanka

Affiliation Department of Poultry Diseases, National Veterinary Research Institute, Puławy, Poland

Monika Olszewska

Affiliation Department of Poultry Diseases, National Veterinary Research Institute, Puławy, Poland

Katarzyna Domańska-Blicharz

Affiliation Department of Poultry Diseases, National Veterinary Research Institute, Puławy, Poland

Zenon Minta

Affiliation Department of Poultry Diseases, National Veterinary Research Institute, Puławy, Poland

Bogusław Szewczyk

Affiliation Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdańsk and Medical University of Gdańsk, Gdańsk, Poland

Grażyna Płucienniczak

Affiliation Institute of Biotechnology and Antibiotics, Warsaw, Poland

Andrzej Płucienniczak

Affiliation Institute of Biotechnology and Antibiotics, Warsaw, Poland

Competing Interests

All the authors (VS AR KF VC-A MK-B KŚ MO ZM BS GP & AP), except Katarzyna Domańska-Blicharz, have filed the Patent Applications P.408649 (2014-06-24), PCT/PL2015/050025 (2015-06-24): Influenza virus hemagglutinin protein as a vaccine antigen. The Patent Applications contain the findings reported in this paper. This does not alter our adherence to PLOS ONE policies on sharing data and materials. The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: VS AR KŚ ZM. Formal analysis: VS AR KŚ. Funding acquisition: BS GP. Investigation: AR KF VC-A MK-B MO KD-B. Methodology: VS AR KŚ ZM AP. Resources: KŚ ZM BS GP AP. Visualization: VS. Writing – original draft: VS. Writing – review & editing: BS.