If this is man-made, it has to be from professional labs with first rate scientists in a country with the ressources and brainpower to do it (or rogue scientists in such a country).
It can hardly be from some podunk backwater country.
Paraphrasing from one of the many articles about concerns of security at bio-labs throughout the world
It is worrying that WHO & CDC cannot account for whereabouts of live virus samples within and outside the US. Chances of virus ending up in hands of terrorists or just simply incompetants is troubling.