China’s most used Covid-19 shots effective against Delta variant: Study

The data is based on an analysis of more than 100 infections and more than 10,000 of their close contacts during a Delta outbreak.

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The study, which involves about 600 participants 21 years or older, is expected to conclude in April 2023. PHOTO: ST FILE

February 3, 2022

The data is based on an analysis of more than 100 infections and more than 10,000 of their close contacts during a Delta outbreak.

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