I don't have the links for the hard data, it's so hard to get anything because of the virtual gag order they have put on people who speak out, here's a recent link I just sent my mom, and it was enough for her, but I don't know your dads personality if he's dead set on it. https://www.survivethenews.com/4-to-14-months-before-we-see-the-full-havoc-of-what-is-happening-to-people-who-have-been-vaccinated/