I had regular measles twice and German measles once. No damage from them, just had to take time off from school on the last one, which was the worst one for me. Could only listen to Star Trek, had to stay in dimly lit rooms, and the spots took a longer time to disappear. No vaccines back then, or the Air Force would’ve insisted.
Kennedy’s stance seems to be take vitamins to help the immune system, not as a replacement for a measles vaccination, leaving that up to the parents. Nothing wrong with that.
Moderna took a more traditional approach which resulted in a safer and more effective vaccine.