Two doses of Pfizer-BioNTech's COVID-19 vaccine appear to have given 70% protection against hospitalization in South Africa in recent weeks, a major real-world study on the potential impact of Omicron...
网页链接Reuters2021-12-14
Two doses of Pfizer-BioNTech's COVID-19 vaccine appear to have given 70% protection against hospitalization in South Africa in recent weeks, a major real-world study on the potential impact of Omicron...
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