A clinical study involves research using human volunteers (also called participants) that is intended to add to medical knowledge. There are two main types of clinical studies: Interventional Studies (also called Clinical Trials) and Observational Studies.
In an interventional study, researchers are testing a treatment method. Participants receive one or
more treatments (interventions) or a placebo that researchers can then evaluate the effects on the participant’s health
In an observational study, investigators assess health outcomes in groups of participants according to a research plan or protocol to develop new ideas and how the disease might best be treated.