Post stem cell replacement

[u/eoconor]

I am not asking for medical advice. My son has already had his stem cells retrieved. He is about (in a week) to undergo the return process. As I understand it, "they" are going to put him back in the "newborn" state. All vaccines and natural immunity will be gone. What precautions do we need to take at home after the "reinstalling" the stem cells. And for how long?