>>15825371 (PB)
Biological weapon research, as opposed to studying a naturally occuring pathogen for purposes of prophylaxis or just plain "wanting to know more about it" is this:
A biological weapon reserach facility will have the means to grow cultures of the pathogen far beyond the needs for simple research. Two, it will be studying means of vectors: aeresolization, contact, in water systems, missile explosion survivability, etc. Three, it will be doing gain of function research - the ways of making the pathogen more lethal or more transmissable.
So if there are any signs of that going on in labs in Ukraine or Taiwan, you got them dead to rights.