The Pfizer-BioNTech Vaccine (BNT162b2) is one among the 47 COVID-19 vaccines undergoing clinical evaluation under WHO guidelines.

It is being developed by American drugmaker Pfizer and its German partner BioNTech.

There are a variety of vaccines out there, differing on so many parameters (dose strength, virulent technology, mode of administration etc.).

The Pfizer vaccine has employed a cutting-edge technology called messenger-RNA or mRNA that has never been approved for human vaccination before.

Click the link to read more on the different vaccine platforms used for COVID-19 and the measure of immunity they provide against the virus.