The preliminary findings for COVID-19 booster for variant BA5 from Pfizer were in fact based on tests in eight mice. People’s concerns about its safety still exist.

辉瑞公司对变异 BA5 的新冠加强针的初步研究结果，实际上是基于对八只小鼠的测试。 人们对其安全性的担忧依然存在。

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