Two doses of Pfizer-BioNTech's COVID-19 vaccine appear to have given 70% protection against hospitalisation in South Africa in recent weeks, a major real-world study on the potential impact of Omicron showed on Tuesday, as the country battles a spike in infections linked to the new variant.
The study released by South Africa's largest private health insurance administrator, Discovery Health, was based on more than 211,000 positive COVID-19 test results from Nov. 15 to Dec. 7, around 78,000 of which were attributed to Omicron.
South Africa alerted the world to Omicron late last month, triggering alarm that it could cause another surge in global infections, and leading to the imposition of travel restrictions on southern Africa. South Africa's daily infections have since risen to around 20,000 in recent days. It said this represents a drop from 80% protection against infection and compares with above 90% efficacy against hospital admission during South Africa's outbreak of the Delta variant, which is the globally dominant variant and considered to be the most infectious to emerge during the pandemic.
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