The innovation is personalized hydrogels built to avoid rejection, not the induced pluripotent stem cells which were re-differentiated into things. The key was the structural materials which hold those cells.
That makes sense but is hydrogel rejection really a thing? I thought hydrogels were already safe from rejection because they don’t contain anything the immune system sees as a threat. Same goes for collagen, no?
https://onlinelibrary.wiley.com/doi/10.1002/adma.201803895