Posted in NEWS Continuing COVID-19 vaccine trials may put some volunteers at unnecessary risk. Is that ethical? December 4, 2020 The success of candidate vaccines by Pfizer/BioNTech and Moderna raises ethical questions about continuing placebo trials in which some may get sick. http://rssfeeds.usatoday.com/~/639579644/0/usatoday-newstopstories~Continuing-COVID-vaccine-trials-may-put-some-volunteers-at-unnecessary-risk-Is-that-ethical/