If vaccination of the child could prevent some baseline level of IL-17a from developing (in offsprings who already suffered the brain degradation in the womb),

If vaccination of the child could prevent some baseline level of IL-17a from developing (in offsprings who already suffered the brain degradation in the womb), it could be interesting. They should look for children who had the risk factor (infected mother) but didn't turn autistic to see if they have the levels elevated. Long shot.