Wearing a mask will soon become a personal choice rather than a must for people inside buildings and on public transport.

Although the government has repeatedly insisted that it will be guided by science, rifts in the approach are revealing between groups such as the British Medical Association and Health Secretary Helen Whately.

So – what do peer-reviewed scientific studies say when it comes to how effective face masks are?

People can voluntarily wear masks after July 19

It has been confirmed that the virus that causes COVID-19 is primarily airborne.

People with viruses, sometimes didn’t know that they had it, spread it through respiratory droplets exhaled when they cough, sneeze, sing, talk or breathe – and these droplets are then inhaled by others.

Based on some belong to lab test and a lot of learn, the main value of wearing masks is that they prevent up to 80% of these droplets from escaping into the air. They can also prevent about 50% of inhaled droplets.

Real-world studies are a bit more difficult to do, but the US Centers for Disease Control and Prevention (CDC) has highlighted a few.

In one high exposure event, two hairstylists – who were showing symptoms – were found to have interacted with 139 clients over an eight-day period.

A worker wearing a protective mask walks past the Bank of England in the City of London
Scientists advocate wearing masks. Photo: Reuters

The stylists and clients both wore masks, and of the 67 clients who later agreed to be interviewed and tested, not a single one was infected.

Again study abroad in China found that, in 124 households where there had been a laboratory-confirmed case of coronavirus, the wearing of masks by both the patient and the rest of the population reduced transmission in the household by 79%. .

Board the USS Theodore Roosevelt, where living quarters and working environments don’t leave much room for social distancing, a study found 70% reduced risk of infection in people who wear face coverings.

In Thailand, a quest case study found that out of 1,000 people interviewed as part of a contact tracing survey, those who reported always wearing a mask during high-risk exposure had a 70% lower risk of infection compared with the others.

An international report published in the journal The Lancet, which analyzed data from 172 studies in 16 countries, found that by wearing a mask only 3% chance catch COVID-19.

Another study showed that Homemade masks can help limit the spread of coronavirus.

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May 2020: Studying the effectiveness of masks

Seven types of masks were put to the test by the University of Edinburgh, including surgical masks, respirators, light and heavy-duty visors and manual masks.

Apart from those with valves, all face shields were found to reduce the forward travel distance of an exhaled breath by at least 90%.

The CDC states: “Empirical and epidemiological data support the wearing of masks by the community to reduce the spread of SARS-CoV-2. The preventive benefit of mask wearing derives from a combination of control. source and protect mask wearers.

“The relationship between source control and wearer protection can be complementary and possibly synergistic, so that individual interests increase as the community uses more masks,” the agency added. .

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COVID-19: Response to mask rule change

The World Health Organization said: “Masks should be used as part of a comprehensive strategy of measures to prevent transmission and save lives; mask use alone is not sufficient to provide adequate levels of coverage. proper protection against COVID-19.

“If COVID-19 is spreading in your community, stay safe by taking some simple precautions, such as staying away from your body, wearing a mask, keeping your room well-ventilated, avoiding crowds. winter, wipe your hands and cough into a bent elbow or tissue. Check local advice where you live and work. Do it all!”

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