Apparently by the age the average person catches the measles naturally, in a society where there is herd immunity because of vaccination, they are unlikely to b

Apparently by the age the average person catches the measles naturally, in a society where there is herd immunity because of vaccination, they are unlikely to become too ill. So it's not so risky not vaccinating your child so long as everyone else does it. But if nobody does it then the average age of infection goes down and these infections are then much more serious