How a vaccine gets emergency approval ?

Renowned vaccine scientist Dr. Gagandeep Kang is talking about the vaccine being developed by Pfizer and BioNTech. She has her thoughts on the vaccine developed by the company. When they tried to seek emergency approval for their vaccine in India, Dr. Gagandeep Kang explained the technicalities of the process. She has also explained here what is emergency approval and how is it sought ? 

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