id author title date pages extension mime words sentences flesch summary cache txt cord-271514-sls3bsm0 Dean, Natalie E. Ensemble Forecast Modeling for the Design of COVID-19 Vaccine Efficacy Trials 2020-09-15 .txt text/plain 2498 139 42 We recommend the use of ensemble forecast modeling – combining projections from independent modeling groups – to guide investigators identifying suitable sites for COVID-19 vaccine efficacy trials. In this paper, we describe a simplified framework for the use of ensemble modeling to guide the selection and continued evaluation of sites for a vaccine efficacy trial, with a focus on the COVID-19 pandemic. Suggested guidelines are the ability to: (i) capture all geographic areas in the candidate list of sites, (ii) disaggregate to at least the first administrative level (e.g. state, province), though finer levels may be preferred for certain planning activities, (iii) project the COVID-19 symptomatic cumulative incidence, i.e. the number of new symptomatic infections of any severity divided by the total population size during a pre-specified period (three months suggested), and (iv) produce a minimum of 1000 simulated epidemics. We describe an ensemble modeling procedure to inform site selection for a vaccine efficacy trial planned during an ongoing epidemic. ./cache/cord-271514-sls3bsm0.txt ./txt/cord-271514-sls3bsm0.txt