Deaths in America from 1999 to 2025
Suicide: 1,100,000
Overdose: 1,500,000
Heart attack: 17,800,000
Measles: 4
I can't speak for RFK but it seems he's more focused on the general public's overall health (obesity, chemicals/poisons in the food supply etc), which is - by far - the greater killer.
Again, I'm pro-MMR, etc. but in the decade before the measles vaccine was introduced the US averaged 400-500 deaths per year per the CDC. I expect focusing on the bigger issues facing our health is where the bigger payoff will be. I'd love it if he were pro-vaccines (specifically the long-proven vaxs) but the reality is you can save a LOT more lives by cleaning up the food supply.
Do both and it's a homerun.