BNT 2 is a COVID-19 vaccine developed by BioNTech and Pfizer. It is an updated version of the original BNT vaccine, designed to provide enhanced protection against emerging variants of the virus. Like its predecessor, BNT 2 uses messenger RNA (mRNA) technology to stimulate an immune response in the body. The vaccine is administered in two doses, typically spaced a few weeks apart. Clinical trials have shown that BNT 2 is effective in generating antibodies and reducing the risk of severe illness caused by various strains of the SARS-CoV-2 virus.