The malfunctioning of the Cowin app has been creating challenges for the BMC. Even though it generated 4,000 messages for vaccine recipients on the CoWIN app on 18th January, the alerts did not reach most health workers and the BMC started calling people in the evening. After a break of two days, it was decided that the vaccination drive would resume on 19th January across 10 centres — nine civic ones and one state-run at the JJ Hospital. Watch this video to find out more.