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Not even the air of empty spaces is coronavirus free (Two meters is not a safe distance). (arXiv:2006.08823v1 [physics.soc-ph]) http://arxiv.org/abs/2006.08823
Not even the air of empty spaces is coronavirus free (Two meters is not a safe distance). (arXiv:2006.08823v1 [physics.soc-ph]) http://arxiv.org/abs/2006.08823