4 more Covid vaccines in different stages of trial: Serum Institute of India

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Apart from Covishield, the Serum Institute of India (SII) is working on four more vaccines against the novel coronavirus, according to Suresh Jadhav, executive director at one of the world’s largest vaccine manufacturers.Apart from Covishield, the Serum Institute of India (SII) is working on four more vaccines against the novel coronavirus, according to Suresh Jadhav, executive director at one of the world’s largest vaccine manufacturers.