Radiation is survivable. Hormesis can keep you from getting sick. Everything the left has ever volunteered about the aftermath of nuclear war has been all lies.
It is never the end of the world. It may just be the end of you. The world will roll on without you. Most people by the time they reach 9 years old have begun to figure this out. The world is tough but humans are expendable. Humans should worry less about what will become of the planet and worry more about what will become of them.
There are some indications that moderately high levels of alpha and beta radiation actually prevent instead of encouraging mutation.
Remember, if you heard it from the left (all television and media is owned by them) then it's an ignorant lie that is like something made up by a disturbed child. Easy rule of thumb.