Not a CBRN guy, but IIRC VX is effective if you get any skin contact what so ever (less then a droplet is considered lethal). Hence why we had to mess with the whole MOPP suit. Using an aerosol mister is pretty much gonna kill everyone there (if that's the plot then carry on). Also why would the soviets be carrying VX, particularly in handy sprayers? If Zukov is gonna kill them off, simply OD'ing them on pain meds is a way easier solution, and also far more likely. Additionally he can claim it was an "accident" as he's not a medic and didn't read the dosages correctly, etc.
