A dry run to check the best way to vaccinate people against COVID-19 and plug loopholes in logistics and training has started in all the states today. This day-long drive will also test the operational feasibility in the use of CoWIN application in a field environment. Short for Covid Vaccine Intelligence Network, CoWIN is a digital platform to roll out and scale up the vaccination drive. The massive exercise comes a day after a panel of government-appointed experts recommended approval for the Oxford COVID-19 vaccine, manufactured by Serum Institute of India, to the regulator Drugs Control Authority of India. Today's exercise is the second dry run being conducted in the country - the first was on December 28 and 29 in Assam, Andhra Pradesh, Punjab and Gujarat.