My mom was a RN most of her career then got her masters and went into education. My dad is a nurse practitioner. I didn't specify it explicitly because I didn't think it was relevant -- I was not trying to use vagueness to imply they were medical doctors and use them as a source of authority. All was trying to do was build them up at least a little, they do know more about the body than most people even if they aren't anywhere near experts on what the vaccine does.