BENGALURU : Several Indian pharmaceutical companies are working to develop or manufacture at least eight anti-COVID-19 formulations as the world's largest producer of vaccines prepares for a massive response to the coronavirus pandemic.India, which has itself been badly hit by the pandemic with nearly 10 million infections, the second-highest in the world, is focusing on affordable vaccines instead of the expensive messenger RNA shots of Pfizer Inc and c Inc.Here is a look at the companies that are developing or manufacturing vaccines in India:Serum Institute of India (SII): The world's largest vaccine producer will manufacture AstraZeneca Plc's Covishield and another formulation developed by US rival Novavax Inc.