A scientific look into the workings of the face shield

    A wind engineer at the University of the Philippines reveals that the face shield Filipinos place over their face masks are in no way protective than they are expected.

    QUEZON CITY — Among all the countries around the globe, the Philippines remains one of the few that holds on to the face shield policy. However, the science behind the workings of donning on a face shield is even grim despite what authorities have claimed this far.

    Wind engineer Joshua Agar reveals how store-bought face shields, not the medical grade type, are by no means providing any protection.

    Based on his wind tests, the face shield intervenes in the flow of air in a room. As wind flows towards the shield, it hits flat on all its surface. Air hitting the edges meanwhile slows down and makes an inside and under turn towards the side the shield is supposedly protecting.

    According to the wind engineer, instead of warding off harmful particulates floating in the air as the coronavirus, it gets to settle in those areas under the chin or the neck, on the temple, the outer sides of the eyes, or the forehead.

    Unlike the medical grade face shields, the store-bought types are stand-alone. Their medical counterparts, meanwhile, are part of the protective suit worn by medical frontliners.

    Truth warriors like wind engineer Joshua Agar are the types we need to provide us honest-to-goodness insights on why policies are prescribed, as against unstudied and unscientific delving into what may look acceptable but are nothing more than schemes.

    Will you still use a face shield now that the science is explained? (RA/The MiNT)

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