New Delhi: ICMR DG Balaram Vargab has said that Indian scientists are working on the preparation of the corona vaccine. “Human testing of two vaccines has begun,” he said. 1,000 volunteers have been selected for each vaccine trial. Russia is the first country to pass a humanitarian test. China, the United States, and the United Kingdom are moving forward. “Everywhere you look today, the tide of protectionist sentiment is flowing. India will play a key role in the production and supply of vaccines. India supplies 63 per cent of the world’s required vaccines.