It is not necessary to be from a clinical background. Basic knowledge of human biology would be helpful in this profession. Also, if a person is well enough to do this profession he must be very clear with the processings that takes place in this place. So, ultimately he would be clear with the clinical background ig the clinical trials. It is not necessary to be from a clinical background. But it would be an additional aspect that serves them if they are from the clinical background. They have an extra knowledge in delaing with things.