Some species form protective capsules called resting cysts, in which the organism remains dormant throughout the winter. (palaeontologyonline.com)
Other experimental approaches include implanting beta cells in protective capsules to prevent rejection and immunotherapy to preserve the pancreas's ability to make insulin. (protomag.com)
This includes transplantation into parts of the body where the replacement cells are less likely to be attacked by the immune system or placement of the cells into protective capsules. (closerlookatstemcells.org)