Clinical Epidemiology

In medicine, what we care about is causality. We want to know, if you take this drug, will it make you feel better? And random ized experiments are the gold standard of causality. But ranmis trails aren't the only research strata used in medicine. There's also this thing called epidemiology. They're costly to do. It takes time to recruit patients,. Not all patients wh cant participate in an experimental drug. So that's why as a field, as a discipline, medicine has had to rely on other approaches to trying to understand causal questions like, does drug a do a better job at treating disease than drug b?