There is a comment under the story that says the doctors said go and the government said no.
Do you know if that is actually the case or not here?
It is not the government that says no, it is the Organ Procurement and Transplantation Network. They set the policy on ages. Her doctors want to go ahead if an adult lung becomes available. However, the procedure comes with more risk than if implanted into an adult because the lung must be shaved down in size.