As scientists across the world scramble to identify the source of the novel coronavirus, a new study points to stray dogs as possible intermediary hosts of Covid-19.The study was conducted by Professor Xuhua Xia, a full-time Professor of Biology at the University of Ottawa, Ontario, and has published two books on bioinformatics and molecular evolution. In an email interview with Outlook, Professor Xia spoke about the significance of his study and how it can help in finding a vaccine for the pandemic.