For example: "Treating Scars After Burns With Pulsed Electric Fields in the Rat Model" - https://academic.oup.com/jbcr/article-abstract/45/6/1553/772...
I wonder if we (or at least, our descendants) will figure out limb regrowth before we figure out functional immortality.
https://www.nature.com/articles/srep31724
Perhaps we should genetically move humanity over time to be more rat like.