Question: Their is a book called Pig heart, in it a boy gets a heart of a pig as a transplant. Is this possible?

Cristina Villa del Campo answered on 9 Nov 2015:

While pigs are one of the best candidates it hasn’t been done yet. Their hearts are very similar to ours in size and anatomy. Right now scientists are testing if they can transplant pig hearts into baboons, to then see if it could be possible to do the same in humans. The problems are basically that we could get contaminated by things that only infect pigs at the moment. And also we should have to suppress our immune system to not attack the foreign cells (although this is needed with human transplants as well)