Instant view: Pfizer, BioNTech say their COVID-19 vaccine is more than 90% effective

FILE PHOTO: Vials with a sticker reading, "COVID-19 / Coronavirus vaccine / Injection only" and a medical syringe are seen in front of a displayed Pfizer logo in this illustration taken October 31, 2020. REUTERS/Dado Ruvic/Illustration

(Reuters) - Pfizer Inc said on Monday its experimental vaccine was more than 90% effective in preventing COVID-19 based on initial data from a large study, a major victory in the fight against the pandemic.

Pfizer and German partner BioNTech SE are the first drugmakers to show successful data from a large-scale clinical trial of a coronavirus vaccine.