THE African Union has criticised an EU decision not to include Covishield, a version of AstraZeneca's coronavirus vaccine used by the global COVAX facility, on a list of approved vaccines for a digital certificate meant to ease travel in the bloc. Covishield is produced by the Serum Institute of India (SII) and has been distributed to African nations as part of the COVAX initiative to give poor and developing countries access to COVID-19 vaccines. But Covishield is not one of four vaccines approved by the European Union for its planned digital vaccination certificate, which is intended to allow people to…