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Pfizer shot less effective in South Africa after Omicron emerges, study shows

Pfizer-BioNTech's COVID-19 vaccine has been less effective in South Africa at keeping people infected with the virus out of hospital since the Omicron variant emerged last month, a real-world study published on Tuesday showed. Between Nov. 15 and Dec. 7, people who had received two doses of the shot had a 70% chance of avoiding hospitalisation, down from 93% during the previous wave of Delta infections, the study showed.

Reuters - December 14, 2021

View the full story here: https://www.reuters.com/business/healthcare-pharmaceuticals/pfizer-vaccine-protecting-against-hospitalisation-during-omicron-wave-study-2021-12-14/