Would everyone wearing face masks help us slow the pandemic?

Would everyone wearing face masks help us slow the pandemic?

Science reports:

As cases of coronavirus disease 2019 (COVID-19) ballooned last month, people in Europe and North America scrambled to get their hands on surgical masks to protect themselves. Health officials jumped in to discourage them, worried about the limited supply of masks for health care personnel. “Seriously people-STOP BUYING MASKS!” began a 29 February tweet from U.S. Surgeon General Jerome Adams. The World Health Organization and U.S. Centers for Disease Control and Prevention (CDC) have both said that only people with COVID-19 symptoms and those caring for them should wear masks.

But some health experts, including the director of the Chinese Center for Disease Control and Prevention, think that’s a mistake. Health authorities in parts of Asia have encouraged all citizens to wear masks in public to prevent the spread of the virus, regardless of whether they have symptoms. And the Czech Republic took the uncommon step last week of making nose and mouth coverings mandatory in public spaces, prompting a grassroots drive to hand make masks.

Even experts who favor masking the masses say their impact on the spread of disease is likely to be modest. Many are also afraid to promote mask buying amid dire shortages at hospitals. But as the pandemic wears on, some public health experts think government messages discouraging mask wearing should shift.

“It’s really a perfectly good public health intervention that’s not used,” argues KK Cheng, a public health expert at the University of Birmingham. “It’s not to protect yourself. It’s to protect people against the droplets coming out of your respiratory tract.”

Cheng and others stress that however masks are used, people must practice social distancing and stay at home as much as possible to prevent the spread of the novel coronavirus. When people do venture out and interact, they’re likely to spew some saliva. “I don’t want to frighten you, but when people speak and breathe and sing—you don’t have to sneeze or cough—these droplets are coming out,” he says. [Continue reading…]

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