This problem is exacerbated by the very small quantities that may be transferred to bolster a weapons capability. When snippets of protein are all that you need, the notion of controlling transfers of such materials becomes a less attractive option.Moreover, the means of delivering chemical and biological weapons can be quite simple, including public transportation networks or the postal system. The Congressional Research Service (CRS) reported that
Compared with most conventional weapons, C/B weapons are less well understood and have the potential to cause mass casualties. Even if used in smaller attacks, C/B weapons have the potential to cause mass terror.