Answer:
Human subject research is systematic, scientific investigation that can be either interventional (a "trial") or observational (no "test and Human subject research can be either medical (clinical) research or non-medical (e.g., social science) research.
WE can keep everything sterile, and germ free therefore preventing infections spreading or being exposed to other people. This will help the healing process because we know how to treat a infection and get the proper treatment to cure it.