They hold a special place in the arsenal of measures to stop the spread of the virus. They are cheap, easy to use and can be deployed almost immediately
IN THE ARSENAL of measures to prevent covid-19, face masks hold a special place. They are cheap, easy to use and can be deployed almost immediately. Laboratory studies have shown that face coverings made of various materials block large amounts of the SARS-CoV-2 virus. But there is a dearth of data on how effective masks are in preventing actual covid-19 cases in real-life conditions, where masks are worn sporadically and, all too often, incorrectly.
Over the course of eight weeks observers stationed in public places around the villages recorded the frequency of mask-wearing. In those villages selected to receive masks and training, proper mask wearing increased to 42% of people counted. In those that didn't the rate was only 13% of people counted. The prevalence of covid-19 cases in villages that received cloth masks was 8% lower than in villages that received none. And in the villages with surgical masks the rate was 14% lower.
The results were most striking among older people, who are the most likely to die of covid-19. The distribution of surgical masks resulted in a striking 35% reduction in confirmed symptomatic cases among people aged 60 or older. Although these results were from rural Bangladesh, they suggest that masks can be effective elsewhere tooeven when fewer than half of people wear them correctly. Saving lives has never been so easy on the wallet.
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