You guys this ought to be easy. Most peoples immun system is active on
the measles virus. A simple series of blood transfusions of an indivudual
of the same blood type at the autistic child. The only true requirement is
that the source of blood has been made hyper immune by multiple
vaccinations. It's almost the same system used for anti-venom that ought to
work. After that scientists can pinpoint the key protiens, reagents, or
enzymes that are responsible for attacking the measles virus. Then by
chemical reduction, resolve a single shot cure.