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You searched for: Author/Creator Wu, Zhi-Yin

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1. A case–case study on the effect of primary and booster immunization with China-produced COVID-19 vaccines on prevention of pneumonia and viral load among vaccinated persons infected by Delta and Omicron variants. Issue 1 (31st December 2022)

2. Relative vaccine effectiveness against Delta and Omicron COVID-19 after homologous inactivated vaccine boosting: a retrospective cohort study. Issue 11 (11th November 2022)