id author title date pages extension mime words sentences flesch summary cache txt cord-270709-jahnjvyk Hasford, Joerg Large Simple Double-Blind Randomized Trials for the Rapid Assessment of the Effectiveness of COVID-19 Vaccines 2020-08-26 .txt text/plain 966 51 49 title: Large Simple Double-Blind Randomized Trials for the Rapid Assessment of the Effectiveness of COVID-19 Vaccines Large Simple Double-Blind Randomized Trials for the Rapid Assessment of the Effectiveness of COVID-19 Vaccines to the editor-The coronavirus disease 2019 (COVID-19) pandemic has brought not only far too many losses of human lives but an economic crisis as well. As all participants have been exposed, the effectiveness of a vaccine can be assessed with smaller sample sizes and possibly more quickly compared to the conventional trial with community participants; however, challenge studies are accompanied by serious ethical issues [3] . Among the advantages of using the LSRT design are that it allows central randomization of large numbers of volunteers within a short time and rapid collection of the relevant outcomes at a low cost compared to the conventional phase 3 trials with many follow-up visits and extensive monitoring. ./cache/cord-270709-jahnjvyk.txt ./txt/cord-270709-jahnjvyk.txt