Fantasies truly are dangerous. There are a couple of places in the world where locals stop polio vaccination. One is Nigeria and the other is the Pashtun regions of Pakistan and Afghanistan. Polio vaccines are a Western or Zionist Plot to kill children or render women infertile. So polio continues to thrive and modern medicine cannot elimate the disease because of irrational fears and bigotry.

Back at home, many Britons stopped taking the MMR Vaccine after it was incorrectly linked to autism. The vaccine has since been proven safe but there are plenty out there believing in fantasies that the government and Big Pharma are lying to the public.