“The most extensive research to date” has found that physical distance and perhaps the use of a mask are the two best ways to prevent new coronavirus infections.
A new study published in the Lancet Medical Journal on Monday found that people should stay at least three feet away and more if possible.
The review of various published surveys provided by the World Health Organization had three main findings:
The researchers conducted 172 observational studies across 1 countries and six continents, including studies on healthcare and community settings. They did not look at randomized controlled trials, considered the gold standard but almost impossible to apply for the study of infectious diseases in humans.
Researchers at universities around the world have analyzed studies from the prevalence of Kovid-19, the deadly acute respiratory syndrome virus of SARS and the Middle Eastern Respiratory Syndrome virus (MERS), which come from the same virus family.
‘Big steps ahead’
The results of the review support the principle of a physical distance of at least 1 meter (3.3 feet) and, if possible, 2 meters (6.6 feet) or more, the researchers said. The research team, led by Holler Schumanmann of McMaster University in Canada, added information to inform models that predict the spread of the disease and help in communication detection schemes.
Thirty Greenhallg, a professor at Oxford University’s Primary Care Health Services who was not involved in the study, said that given the uncertainty of all these results, the irresistible message was that physical action was effective in preventing Covid-19.
“This is a big step in our knowledge, because previous meta-analyzes were based primarily on influenza and other diseases, which do not behave like the Covid-11 virus,” he told the Science Media Center. London.
“Evidence in all three questions seems to support the system, for example, being 1 meter away from other people on average reduces your chances of catching a Covid-19 by 70%. And your risk of wearing goggles or face shields increases by 85%. It looks like it will be reduced by 78%. “
Tariq Zairevi, a spokesman for the WHO, said the World Health Organization was in the process of updating its advice on wearing masks, with changes likely to be announced this week.
Changes can probably touch up with the best materials to create The masks are based on the latest information from the United States, ”he told CNN via email.
“The WHO has focused on the use of masks where there is evidence that they can limit infections, such as in healthcare settings. In fact, the new guidelines could extend their use in these settings.”
The next step for government leaders
Linda Bould, a professor of public health at the University of Edinburgh, said the government and the public should now explain these results.
“The first and probably the most useful finding is the issues related to physical distance. There have been many complaints that the direction is extra in the UK at a distance of 2 meters, because it is higher than in other countries,” he told the Science Media Center.
“However, this review supports it. Maintaining this distance has the potential to reduce risk by less than 1 meter. So wherever possible, this is the distance that retailers and employers should use as more space and workplaces reopen in the future.”
Bould added that the lack of evidence in facial masks made it more difficult for the government to make this compulsory, adding that the review added to the evidence that leaders are asking the public to cover their faces in transportation, stores and other areas, even if they are physically remote.
In the case of healthcare professionals, studies have shown that N95 masks and other respiratory-type masks may provide more protection against viral infections than surgical masks or multilayer cotton or gauze masks.
As Oxford’s Greenhall noted, the review did not look at the effects of wearing masks to protect other people. He said the general public should wear cloth masks or standard surgical masks, leaving the refrigerator mask for healthcare workers.
Even when used properly and connected, distance, mask and eye protection do not provide complete protection, the study emphasizes, and primary measures such as hand washing are necessary to reduce infection.