I understand that it is normal to worry about the life of another human being but it is a moment where the livelihood of the masses matters more than the individual. One thing that is not often mentioned is that the studies are voluntary. Due to the policies on correct treatment of patients the patient has to be aware of the risks of the study they are involved in. If a patient is aware of the risk and they are willing to do the study still the clinical research should continue. The biggest concern is making sure the study is worth occurring in the first place. If the there is no proof of the likelihood of success than the study should be seen as unethical.