Which among the following Indian drug makers is developing a COVID vaccine booster shot that would be more effective against Omicron?

Serum Institute of India's CEO Adar Poonawalla said on December 14, 2021 that they are working towards developing a vaccine booster shot that is more effective against the new Omicron COVID variant. He said that booster shots are a proven strategy to increase antibodies against COVID-19. He also informed that vaccines for children above 3 years will be launched in the next 6 months.