I'll be a bit adventurous!! Maybe a bio warfare sample got out accidentally or deliberately(a test) to see what would result(re lab not far from Wuhan and Toronto/Canada Chinese lab bio scientists(spies?) This virus is very refined(engineered ?) Lab animals set loose or delivered to Wuhan markets?? Drains(water)being sprayed with poisons to kill wild animals who may drink from them ? I'm no expert, but who really knows at this stage or will ever know.