The Pfizer/BioNTech vaccine first made headlines in early December when the United Kingdom approved it for emergency use. Since then, several countries including the US, Canada, and Bahrain have given emergency approval to the vaccine. On Thursday, 31st December, the World Health Organization (WHO) issued Pfizer an emergency approval. Thus, making it the first COVID-19 vaccine to be listed under WHO’s Emergency Use Listing (EUL).
Source: https://journal.medizzy.com/who-issues-emergency-approval-for-pfizer-vaccine/