Zydus Cadila's ZyCoV-D is the first COVID-19 vaccine in India to receive DCGI's approval for emergency use in children aged 12 and above. The world's first and India's indigenously developed DNA-based COVID-19 vaccine showed 66.6% efficacy in Phase-III trial. "This three-dose vaccine which when injected produces the spike protein of the SARS-CoV-2 virus and elicits an immune response," Centre said