A medical worker administers a dose of flu vaccine to a recipient at a medical center in Rosemead, California, the United States, on Dec. 10, 2022. (Xinhua)
This Phase 1 trial will test the experiment
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A medical worker administers a dose of flu vaccine to a recipient at a medical center in Rosemead, California, the United States, on Dec. 10, 2022. (Xinhua)
This Phase 1 trial will test the experiment