Covaxin, along with Covishield, was first deployed by India in January to battle the pandemic.

The World Health Organization (WHO) has further delayed the emergency use authorisation (EUA) for Covaxin, the Covid vaccine developed in India, as the global body has sent more technical queries to its manufacturer Bharat Biotech, according to sources.

Covaxin, along with Covishield, was the vaccine first deployed by India in its massive nationwide inoculation drive against COVID-19 launched in January this year.