A second dry run to check the best way to vaccinate people against COVID-19 and plug loopholes in logistics and training is taking place across 737 districts in the country today. The first massive dry run was held on January 2. The day-long exercise will again test the operational feasibility of the 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. Health Minister Harsh Vardhan has asked state health ministers to submit their inputs after the dry run gets completed.