Plastic visors fail to provide adequate protection from coronavirus infection and should only be worn in combination with a face mask, Swiss authorities have announced. Health officials came to the conclusion after discovering that only people wearing plastic visors were infected during an outbreak the canton of Graübunden. They found a worrying trend when investigating the cluster among staff at a hotel, namely that all of those infected wore plastic face shields, while those wearing face masks came out unscathed. Several employees of the hotel tested positive along with a guest. Rudolf Leuthold, head of the cantonal health department in Graübunden, said the face shields were the common denominator in infections. “It has been shown that only those employees who had plastic visors were infected. There was not a single infection among employees with a mask.” As for the guest, he told Swiss news outlet 20 Minutes: “We know that (he) was served by employees with plastic visors." On Tuesday, the cantonal health authorities in Graübunden said plastic face shields didn’t work.
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