Scared about dangerous side effects from MMR - did you and/or your baby have problems with it?

I did not. And neither did either of my children. I think you missed that for one of the options.

Do you know if your family has any hereditary immunodeficiencies? You can do genetic testing prior to confirm if you’re worried about your child having a similar reaction.

Our pediatrician recommended against MMR for our son (almost all the vaccines actually), due to similar history/existing conditions.