Clinical Trials are the medical research studies involving people. The basic aim behind them is to find out, if a new treatment or medical procedure is safe, whether it has side effects, and it works better than the treatments already in use.
Clinical trials is usually done in 3 phases:
Phase 1, is carried out with small numbers of patients to see if the new treatment or drug is safe or has any harmful effects.
Phase 2, tests the new treatment to see if it is likely to work for a particular cancer. Only treatments that get through phase 1 and 2 trials enter phase 3.
Phase 3, trials test the new treatment to see if it works better than the standard treatments available.
