When someone doesn't vaccinate their child and they get the measles, which kills someone else's child, who was too young to be vaccinated, that also seems wrong

When someone doesn't vaccinate their child and they get the measles, which kills someone else's child, who was too young to be vaccinated, that also seems wrong. People will spend their entire lives as a potential danger to society. I don't think the measles, for example, will be eliminated.