The Russians produced tons of weaponized smallpox,developed special ICBMs with refrigerated "warheads" to carry the stuff,and a deployment plan,which called for dropping the stuff into crowded western cities.
Now-just a few years later- "It's all a fairy tale."
I would guess,having verified quite carefully that the US has lived up to the Bioweapons Ban,the Russians are setting up their Biopreparat labs again.