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Pfizer Shot Just 33% Effective Against Omicron Infection, But Largely Prevents Severe Disease, South Africa Study Finds

Topline Two doses of Pfizer’s Covid-19 vaccine seem to provide just 33% protection against infection with the omicron coronavirus variant but still give strong protection against severe illness, according to a real-world study from South Africa’s largest health insurer, promising early findings as governments around the world battle to contain the fast-moving variant. Key Facts…
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