A new JAMA study reveals that a large swath of the general public agrees with a variety of medical conspiracy theories. More than a third of Americans surveyed believe that pressure from the drug companies has led the US Food and Drug Administration to prevent the public from getting natural cures for cancer. And, one in five Americans believe that health officials know that cellphones cause cancer but that big companies are pressuring them from doing anything about it. What do you think? The chart below tells more.