The sun does not cause cancer. That's one of the big lies people have been told. If the sun caused cancer we as a species would have died out a long time ago. The sun is the main source for vitamin D which is more of a hormone than a vitamin and it's also a cancer fighter. Sun screen, on the other hand, has several carcinogenic ingredients. That is why the sunscreen isn't locked up. The same principle applies the the vaccines and it's why they are free. If they were so miraculous they'd cost a fortune.