**Preface to "State-of-the-Art Avian Viruses Research in Asia"**

To date, the rapid progression in avian virus research in Asia has resulted in abundant achievements. This has mainly contributed to the development of some innovative techniques, advanced approaches, and the timely resolution of urgent issues. More and more new research topics focusing on emerging novel viruses have been found in various avian species. As the source of an important food supply, retaining the health of the birds remains the first priority for the poultry industry and research teams around Asia. Therefore, the accumulated knowledge about the fundamental biology, pathogenicity, epidemiology, antiviral strategies, vaccination schemes, and exceptional applications of avian viruses built up by expert research groups in Asia has accelerated the overall understanding of those key pathogens. Thus, the research articles on all research aspects of avian viruses from Asia were collected in this Special Issue. These valuable studies surely demonstrated some parts of advances in the research on modern avian virology.

> **Chi-Young Wang** *Editor*
