Are Vaccines Safe Without Phase-3 Trials?

The vaccination drive against COVID-19 has begun in India amid several concerns regarding the safety and efficacy of vaccines.

The vaccination drive against COVID-19 has begun in India amid several concerns regarding the safety and efficacy of vaccines. Scientist Satyajit Rath talks about the vaccination drive and the debate around the lack of results from the phase-3 trial of Covaxin, manufactured by Bharat Biotech.