They have difficulties in acquiring and using language. The cause of autism is not known but, as usual, there are lots of theories. Among these theories are Autoimmune disease. The myelin sheath protects nerves and is usually attacked in such diseases as Multiple Sclerosis. Before the advent of vaccinations, autism was largely unknown.
Many children acquire autism after being vaccinated.
Vaccination may cause autoimmune disease. Leaky gut syndrome. A leaky gut may be the reason Candida gets out of the intestines and into the brain. Prenatal infections such as Rubella have been shown to be a cause. Metabolic disorders such as phenylketonuria or celiacs disease may be implicated.