full article with refernces since it seems to no longer be on the Catholic Insight website.

most are thrown away, due to contamination from the donor's lifestyle, and what they put in their bodies (inhaled or ingested.) The vast majority of the rest, never find a type match.

I will never be an organ donor for that reason. I read a story once about a patient declared brain dead, the hospital wanted to harvest his organs, but the family said no, wait. Two weeks later the patient woke up and over time made a full recovery. If you want to donate your organs, tell your family, don't list it on your driver's license or anything.

Organ Donation is a Satanic Jew Racket and They will Take Your Parts While You’re Still Alive