Doctors say his work on a woman now "virtually unable to walk" is deeply flawed.
Mike Davies spent 70 days in intensive care with meningococcal meningitis and septicaemia.
Children at one UK school have been testing them out. Some say other approaches should also be taught.
Kimberley Leech, 15, has appeared in the Italian edition of Vogue magazine.
The treatment, developed over 30 years, is the first to give partial protection to children, WHO says.