mRNA-1273是做过动物实验的

我上NIH网站查过https://www.nih.gov/news-events/news-releases/nih-clinical-trial-investigational-vaccine-covid-19-begins,“The mRNA-1273 vaccine has shown promise in animal models”,显然这个疫苗是做过动物实验的,为什么大家都传没做过呢?

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