A Wuhan-based scientist who had a patent for a coronavirus vaccine just after the COVID outbreak was thrown off of a roof to his death in May 2020, according to witnesses.
a) zoonosis in a wet market, b) zoonosis elsewhere, c) accidental escape of an unmodified virus kept in a lab, d) accidental escape of an engineered virus, e) intentional release.
Option A is out. The most likely scenario is C as I see it.