NAVI MUMBAI: Amidst short supply of vaccines, the Navi Mumbai Municipal Corporation (NMMC) has received help from a private bank, which will carry out a free mass immunisation drive. The NMMC approved a proposal from Citibank a few days ago to supply 25,000 free doses as part of its CSR activity. Citibank has roped in Jaslok Hospital, which will supply the Covishield vaccines meant for both first and second doses.