" BCG is widely used and the safety of this vaccine has not been a serious issue until recently. There is a concern that use of the vaccine in persons who are immune compromised may result is an infection caused by the BCG itself. Also, even among immune competent persons, local reactions, including ulceration at the site of vaccination
may result in shedding of live organisms which could infect others who may be immune compromised."
Since most of the population lives unhealthy lifestyle this could spread to epidemic proportions of people with autoimmune diseases....Oh it already has.
Autoimmune Disease-fight back
"The early use of BCG was marked by a tragic accident. In Lubeck more than 25% of the approximately 250 infants who received a batch of the vaccine developed tuberculosis. It was later recognized that this batch was accidentally contaminated with a virulent strain of M. tuberculosis."
Another whoops for the incompetence theorists to fall back on.