Virus May Have Arrived in U.S. in December, but Didn’t Spread Until Later. #discovery #Science #technology #tech #research #education #scientists https://t.co/PZe023PdGA
— Yusra Salim | يُسرى بِنْت سالم (@Shulab) December 2, 2020
from Twitter https://twitter.com/Shulab
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