Entertainment Covishield vaccine trial: Six out of 249 volunteers drop out ahead of second dose in Mumbai By qatarviral_admin - December 9, 2020 0 654 Facebook Twitter Pinterest WhatsApp Six volunteers who were participating in the clinical trial of Oxford-AstraZeneca vaccine for Covid-19, Covishield, at the King Edward Memorial (KEM) hospital in Parel, Mumbai, have dropped out. However, at the BYL Nair Hospital, which is another…