Speculation can make one feel better but in the end actual facts count for more...possible someone in the “bug factory” was infected w/o knowing it and ended up stating it...but seems very odd that those in the place would start such a thing in their own backyard....
If it is true that this virus is a weapon, I find it very plausible that it was intentionally introduced into the general population. We have seen many examples of questionable behavior over the last few years and it seems it is almost a competition do do the next bigger and dumber thing.