This is how brand new vaccines are approved to the pediatric immunization schedule. Basic dialogue before they voted:
Q: Is it dangerous to use this vaccine with other vaccines?
A: We have no data on that.
Once approved, it will be given along with other vaccines but we have no clue whether that’s safe or not.
Q: Do we at least have any data from other countries that used this vaccine in combination with other vaccines?
Sounds good to me. Lets vote yes!
Only after they vote, one guy voices concern over 16 heart attack deaths in the safety trials.