Disclosingshite vaccines are also there to protect the rest of the population from your children.
If your DD has early stages of mumps and infects a young man/boy (while standing next to them in a supermarket for example) who is immunosuppressed due to cancer therapy or similar, your stance is responsible for his sterility!
If your DD has rubella she can expose a newly pregnant woman, who may also be immunosuppressed due to her organ transplant, to the virus and she is then responsible for a severely disabled baby.
It's not just about exposing your kids to an imaginary risk, it's the risk posed to others through no fault of their own who are not immune through other illnesses!!