NEW DELHI : Major Indian airports will provide flexible slots and separate temperature-controlled zones while air cargo operators would run multiple flights in a short time span to transport COVID-19 vaccines that are expected to become available in India early next year.The Indian government is in touch with Moderna, Pfizer, Serum Institute of India, Bharat Biotech and Zydus Cadila over the progress of the clinical trials of each of the vaccine candidates.The CSMIA (Chhatrapati Shivaji Maharaj International Airport) in Mumbai is the "largest pharma gateway in the country" and it will provide flexible slot allocation for ad hoc freighter operations for transportation of COVID-19 vaccines, a spokesperson of the airport told PTI.A slot is a.