Others say that silicone binds to proteins, and that these complexes cause an autoimmune response.

ECONOMIST: Scientific justice

Early increased growth is associated with the body making more insulin, which is thought to increase the likelihood of an autoimmune response to pancreatic islet cells.

BBC: 'Thriving' babies in diabetes risk

This is a rare brain disorder that is caused by an autoimmune response which destroys the human equivalents of the ion channels that are affected in the mutant fruit fly.

ECONOMIST: Memory formation