People volunteer to participate in a clinical trial for a number of reasons. You may get involved in a trial because you simply want to help in the advancement of science. Or you may be suffering from a disease for which a good treatment does not exist presently. You may join a clinical trial hoping to get improved medical care. Or you may not have health insurance, and clinical trials are a way to get study-related medical care. You should ask your physician and your research center staff any questions before you volunteer.