$IBIO What’s the next IBIO-201 PR? I think this is it... The announcement of a CRO (contract research organization) partnership. The purpose of using the CRO is to conduct the toxicology studies needed to prove to the FDA that the vaccine is safe to use clinical trials (aka human trials). This is the final step in securing the NDA (new drug application) approval from the FDA to move into Human/Clinical Trials. These studies are the studies that usually involve a number of animal models including primates, pigs, and other animals. Everything done thus far has been mice at this point.