Two doses of Pfizer-BioNTech's COVID-19 vaccine appear to have given 70% protection against hospitalization and 33% protection against infection in South Africa since the Omicron variant emerged last month, a real-world study showed https://t.co/bTwEv1Ppwf pic.twitter.com/FhfyReczPy— Reuters (@Reuters) December 14, 2021
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