The race to bring vaccines to market is nearing the finish line. Determining which product can best contain the pandemic, however, will take more time.

中文翻译：

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COVID-19疫苗准备推出，但对大流行的影响尚不清楚

将疫苗推向市场的竞赛已接近终点。但是，确定哪种产品最能遏制大流行病将花费更多时间。