Biological agents that produce ricin

The mid-spectrum region between chemical and biological agents includes substances such as bioregulators and toxins. These are all chemicals and almost all are not included in the Schedules - the two that are listed in Schedule 1 are ricin and saxitoxin. These mid-spectrum materials can now be readily produced in quantity -and for prohibited purposes, impurities are not a problem. The challenge to the Convention posed by such materials is further increased by the recent advances in drug-delivery techniques. 

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