Sarah L Caddy, University of Cambridge There are currently at least six COVID-19 vaccines in phase 3 clinical trials – the final phase of testing. These trials all aim to compare the safety and effectiveness of the vaccines versus a placebo. However, as Peter Doshi, associate editor at the BMJ, asks in a new report, … Continue reading Coronavirus vaccine trials won’t tell us if they save lives, prevent serious illness or stop transmission – here’s why