It would be hard to Grinch I used to smile and then I worked at Boots UK shirt. Americans have more than one subject. That lends itself to consperecy, politics, all other long term cures for cancer. And the other health issues. For over a hundred years we have known the term Medicine, and related it to be the answer to all kinds of diseases in the world. But greed and political power made the ideal tool to manipulate all pharmacies, hence the term Business. You have a phase 1 trial, which tests safety on 10-100 people, then you have phase 2 on people which tests effectiveness and follows up on safety. Last but not least you have a phase 3 trial that tests effectiveness, safety and a few other things just on a large scale of about anywhere from 1000 to 60 000 people. After that you have a approved drug.