What are Clinical Trials?
Clinical trials look at the safety and effectiveness of new medical treatments, like stem cell therapy, on people. The experiments involve several different stages.
At the Discovery and Preclinical Stages, testing only involves non-human subjects. Next, Phase 1 Trials are run on healthy volunteers to determine if a drug is safe in humans. If it passes, it will proceed to Phase 2 & 3 Trials, where therapeutic effects are determined.
Clinical trials need to be approved by health authorities and ethics committees in the countries that they take place.