clinical trial https://en.wikipedia.org/wiki/Clinical_trial a clinical trial is a medical interventional study where participants are assigned prospectively to an intervention or interventions according to a protocol to evaluate the safety and efficacy of the intervention(s) on biomedical or other health related outcomes. The Interventions include but are not restricted to drugs, cells and other biological products, surgical procedures, radiologic procedures, devices, behavioral treatments, process-of-care changes, preventive care, etc. https://www.who.int/ictrp/en/ https://prsinfo.clinicaltrials.gov/definitions.html interventional trial https://clinicaltrials.gov/ct2/search/map Oliver He, Asiyah Yu Lin, Qingliang Li Interventional Study