Clinical studies is the study of health and illness of the people. It’s a way learn how to prevent, diagnose and treat illness. Clinical studies describe different elements of scientific investigation. It observes people in normal settings. Researcher gather information, group volunteers according to the broad characteristics and compares the changes over time. Researchers can collect data through medical exams, tests or questionnaires. Pros includes, access to the new drugs which are better than the standard treatment. Treatment and progress are monitored closely than the usual treatments. It may have less side effects than the usual care. Cons include, there is no surety of the outcome, new treatments may not be as effective as the standard ones. There is possibility of unexpected, serious life-threatening side effects. There is more frequent hospital visits, more test is required than the standard treatments. So I think clinical studies is necessary to have a better future in medical industry.