@Noodles12 I think dahil meron kc sya history ng ITP (a certain blood disease-very low platelates) when he was 5y/o. Pero cleared na sya kc naovercome naman nya as he grows. Now he's 8y/o. Yung 2 older sisters naman nya di nman hiningan ng Form815 kahit na may history sila ng primary complex when they were young.
I'm not sure, pero siguro makakatulong kung mag frontload ka na ng Form815. Baka makasave din ng time. I might do the same if di ako nag-agent. Sana may makatulong na iba nating kasama for any advice.
All the best!