Domestic COVID certificates: what does the evidence say?
Born to help reopen international travel routes, digital COVID certificates are now required in several countries to enter premises such as bars, restaurants, gyms, pools, and museums, and to attend large public events. But do they work — and what for, precisely? More fundamentally, is it even possible to have an evidence-based debate about them at all? Tracing The Tracers looked at the lessons we should learn from the available literature, with the help of a stellar group of researchers.