MGH launches phase II trial of [100yo] BCG vaccine to reverse type 1 diabetes(eurekalert.org)
eurekalert.org
MGH launches phase II trial of [100yo] BCG vaccine to reverse type 1 diabetes
http://www.eurekalert.org/pub_releases/2015-06/mgh-mgh060315.php
Presumably someone has looked at rates of those types of diseases in Eastern Europe, where BCG was used a a vaccine for TB for years.... but I have no idea if it worked preventitively.