20 Seconds, 30 Seconds, 45 Seconds? How Long Should You Wash Your Hands?. #discovery #Science #technology #tech #research #education #scientists https://t.co/ifoQu7FKGu
— Yusra Salim | يُسرى بِنْت سالم (@Shulab) April 1, 2020
from Twitter https://twitter.com/Shulab
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