Presumably it's even odds as to who has more PFAS: the donor or the recipient. And if you need a blood transfusion (often in an emergency), the PFAS is probably

Presumably it's even odds as to who has more PFAS: the donor or the recipient. And if you need a blood transfusion (often in an emergency), the PFAS is probably a small negative on a hugely positive treatment. It's like pesticides on plants: it's probably slightly unhealthy to eat the small level of pesticides on most plant food, but it's worse to miss out on all the nutrition in plants.