Thứ Sáu, 17 tháng 4, 2020

NPR News: Scientists Try To Speed COVID-19 Vaccine Development

Scientists Try To Speed COVID-19 Vaccine Development
A year to develop a COVID-19 vaccine may seem like a long time, but it typically takes longer. We examine how vaccines are developed, and how researchers are trying to speed things up.

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April 17, 2020 at 04:02PM

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