You spin the wheel, you take your chances. Like the rest of us.
I know some diabetics have decided not to have children, just in case. I know others who have decided to have children. Including me. One thing I've learned about my health and that of my children is that you do the best you can do and let go of control of the future. Taking charge of the future instead of waiting around for scary things to happen, that's anxiety speaking. And it's well beyond our current level of medical knowledge.
Rotavirus is part of the regular vaccine schedule and any pediatrician or clinic will give it.
https://www.cdc.gov/vaccines/schedules/easy-to-read/child-easyread.html