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.
Đọc thêm tại NPR
at April 17, 2020 at 04:02PM
Health & Science
Thứ Sáu, 17 tháng 4, 2020
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