From the information that I have seen organ harvesting is done after death with the exception of a kidney. Time is certainly critical, the organs are iced and quickly flown to the recipient. George Webb, a good investigator that posts on YouTube and CrowdSourcetheTruth indicates that kidnapped victims in human trafficking can be held waiting for very fresh harvesting. Haitians are reportedly used in this manner, along with others. The Mayo Clinic is suspected of also being involved though I doubt if more than a very few employees know anything about it. Many more investigators and whistleblowers need to step forward in all of this. It's a process of bringing all of it into the light of the collective consciousness in order to effect the necessary changes.