In Focus
Covid-19 vaccine: Winter update
Almost 200 Covid-19 vaccine candidates are currently being developed. Ten candidates, including the Pfizer/BioNTech vaccine, are currently in largescale phase 3 clinical trials. This article provides an update on the Covid-19 vaccine, looking at when a candidate is likely to be available for deployment, who will be prioritised when a candidate becomes available, and how the vaccine will be distributed internationally.