A huge vaccination drive aimed at covering at least 40,000 individuals in a day is being held in Telangana today. Three hangars or halls with 100 vaccination counters each have been set up to administer the Covaxin vaccine (developed by Hyderabad-based pharmaceutical firm Bharat Biotech in collaboration with the ICMR) for the mega vaccination drive being held at the Hitex exhibition grounds in Madhapur in state capital Hyderabad.