Seizures & itchy rash

Where can I find more information on effects of Hepatitis B vaccine on children?

My grandson had the first shot when he was only hours old and the second one about a month later.

He has had several seizures since and his skin breaks out in a red itchy rash. He has been seizure-free for the last two years but still gets a bad rash.

He'll be four this month.

Thank you.
Grandma Tweet