The Kawasaki Disease Forum

My son Gabriel is 5 years old now, he was diagnosed Kawasaki Disease in his 11 month.
His ECO test result was good, but there is one thing that bothers me..
His development seems slower since his recovery (he can walked 3 steps before get ill),
he has speech delay, low tone muscles and ADD symptoms,
he had ABA and Sensory Integration therapy session for 2 years now.
I wonder is there any correlation between the Kawasaki and the problem he had, maybe the high fever for 7 days effect his brain, or something like that,
and maybe is there any way to help him ?
Hope this parents forum can share some information with me..
Thank you..