Definitely Darwinism in action. More blood for me if I need it.

People are refusing transfusions from donors vaccinated against covid

https://www.newscientist.com/article/2523157-people-are-refusing-transfusions-from-donors-vaccinated-against-covid/

Patients are requesting that blood transfusions come from people who they know have not been vaccinated against covid-19, which can cause dangerous delays.

A hospital in the US has had to concede to an unusual request from patients requiring blood transfusions: that they come from donors who haven’t been vaccinated against covid-19. This has led to delays in treatments that caused one individual to experience a life-threatening reaction.

“These requests were often driven by misinformation about vaccine safety and the blood supply, rather than evidence-based transfusion concerns,” says Jeremy Jacobs at Vanderbilt University Medical Center in Nashville, Tennessee. “I think one of the most important broader points is that the community blood supply is already highly regulated and carefully screened, and there is no evidence that requesting unvaccinated blood improves transfusion safety.”