Tag Archives: Mt Vernon

.. https://twitter.com/KarenAScofield/status/1425616108338429956?s=19 https://twitter.com/SGHouse90/status/1424934396176523264?s=19 his is not an immunologist he just likes the sound of his own voice! Both surgical masks and unvented KN95 respirators, even without fit-testing, reduce the outward particle emission rates by 90% and 74% on average during … Continue reading →