New Delhi: The central government will support Hyderabad based Indian Immunological limited (IIL) with grants under the Mission COVID Suraksha for developing drug substance to make Bharat Biotech’s covid-19 vaccine covaxin.A technical collaboration agreement has been reached between IIL, a facility under the PSU, National Dairy Development Board and Bharat Biotech, for IIL to supply of the drug substance required the for manufacturing Covaxin Vaccine to Bharat Biotech, the ministry of science and technology said in a statement on Friday.“The IIL is planning to start the production of drug substance for Covaxin from next month, June 15, and send out the first batch to Bharat Biotech limited by July," Dr K Anand Kumar, Managing Director of.