That's a much bigger deal than whether you have 12 in a million or 24 in a million chance of something that has a 5% chance of being fatal.
Giving a population lead poisoning didn't kill any of them outright but cognitive problems in the lead generation is correlated to our higher homicide rates and many of the poorer outcomes in our generation and echo's of its affects in society.
I find it interesting that the wider anti-vax demographics overlap heavily with the safety/helicopter parenting that focuses on some extremely unlikely demise as a reason to limit the next generation in ways that will have much higher rates of earlier deaths and reduced lifestyles when considering their overall lifespan.