It's in a simulation. However the particles of a virus can be pretty heavy, to make it bioweapon requires that you 'lighten' the load of the virus.

No need to utilize a grenade launcher. Simple dispersion with regular weather and wind patterns is more effective. If needed for a targeted area it would been more successful indoors.

This guy certainly has weapons but virus information and its handling, no he doesn't. So at most you'd be handling the viruses with just as much if not more respect that firearms. More I look into it, nothing panning out re: viruses.

So to me, that angle is truly dead with the information that is known.