(b) The complete lack of reliable evidence of defensive biological warfare preparations strongly suggests that the Germans are not at present contemplating the initiation of biological warfare. (c) Even if, contrary to our belief, the enemy were in a position to initiate biological warfare, we believe that the probability of immediate retaliation by chemical warfare, and ultimate retaliation by biological warfare would be a strong deterrent. We conclude, therefore, that it is improbable that the enemy will initiate this form of warfare.