User blog comment:B214/Volume 23 discussion blog/@comment-77.188.210.226-20170509230841/@comment-29963364-20170509233928

Does it help to know that Reincarnated Devils have to go to different hospitals because their biology & anatomy is different from Pure Devils?

When Issei got sick (in one of the short stories), he had to go to a Hospital that specialized in "human" Reincarnated Devils.