A US hospital has rejected a patient for a heart transplant at least in part because he is not vaccinated against Covid-19.
DJ Ferguson, 31, is in dire need of a new heart, but Brigham and Women's Hospital in Boston took him off their list, said his father, David.
He said the Covid vaccine goes against his son's "basic principles, he doesn't believe in it".
The hospital said it was following policy.
Brigham and Women's Hospital told the BBC in a statement: "Given the shortage of available organs, we do everything we can to ensure that a patient who receives a transplanted organ has the greatest chance of survival."
A spokesman said the hospital requires "the Covid-19 vaccine, and lifestyle behaviours for transplant candidates to create both the best chance for a successful operation and to optimise the patient's survival after transplantation, given that their immune system is drastically suppressed".