Anyways, whatever the case biological weapons i guess would seem to those who use them as a perfect weapon during an Armageddon scenario. After all, nukes will destroy both nations, thus why not strike with biological weapons as well to make sure that whatever is not tainted by radiation is crippled by disease? And since this would be during the occurence of a nuclear conflagration it really wouldn't matter even if super-virulent strains of spliced smallpox was released (even though it would have a high chance of eventually getting back to the nation that created it. Why care if you would not be alive!)
This will interest you.