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Hong Kong covid expert calls masks with valves ‘selfish’ after suspected infection in quarantine area

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Yuen, who advises the Hong Kong government on covid policies, went on to call valve-equipped face shields “selfish,” explaining that these vented designs “filter the air when inhaled.” in, but when the air is exhaled through the air valve, it is not filtered, which is not good,” South China Morning Post reported.

https://www.washingtonpost.com/world/2021/11/24/hong-kong-valve-face-mask-covid/?utm_source=rss&utm_medium=referral&utm_campaign=wp_world Hong Kong covid expert calls masks with valves ‘selfish’ after suspected infection in quarantine area

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