RT Journal Article SR Electronic T1 Ethical considerations for protecting the options of subjects in primary epidemic vaccine trials JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 360 OP 360 DO 10.1136/medethics-2020-106851 VO 47 IS 5 A1 Arthur L Caplan A1 Jerrold L Abraham YR 2021 UL http://jme.bmj.com/content/47/5/360.abstract AB