95W

95W is an unofficial designation given to the COVID-19 vaccine developed by Pfizer-BioNTech, specifically the BNT162b2 vaccine. The "95W" moniker is derived from a World Health Organization (WHO) report, which noted that the vaccine was 95% effective in preventing COVID-19 in a Phase 3 clinical trial. This report was published on November 10, 2020, and the vaccine was subsequently approved for emergency use by several regulatory agencies.

The Pfizer-BioNTech COVID-19 vaccine is a type of mRNA vaccine, which is a relatively new approach to vaccine development. mRNA vaccines work by introducing a piece of genetic material, called messenger RNA, into the body, which instructs cells to produce a viral protein. The immune system recognizes this protein as foreign and mounts an immune response, providing protection against future infections.

The 95W designation has been widely reported in the media, but it is essential to note that it is not an official product name or branding designation. Pfizer and BioNTech have chosen to market the vaccine under the name "COMIRNATY" in the European Union and under the name "Pfizer-BioNTech COVID-19 Vaccine" in other regions. Despite its unofficial status, the 95W designation has become a widely recognized term within the context of the COVID-19 vaccine, symbolizing its high efficacy in preventing severe disease and hospitalizations due to COVID-19.