Study shows mask-wearing halves COVID risk
As COVID-19 makes a comeback in Europe, one study offers a
reminder that simple measures like mask-wearing and hand-washing help to ward
off the disease, while hand-washing and physical distancing cuts the risk by a
quarter.
A review of eight studies published in the British Medical
Journal (BMJ) says that donning a face mask more than halves the risk of
getting COVID.
The findings come amid evidence that vaccination efforts
weren't enough to prevent a resurgence as temperatures drop and people crowd
indoors, forcing countries including Austria and the Netherlands to introduce
curbs.
"It is likely that further control of the COVID-19
pandemic depends not only on high vaccination coverage and its effectiveness
but also on ongoing adherence to effective and sustainable public-health
measures," authors including Stella Talic, the study's lead researcher and
an epidemiologist at Monash University in Melbourne, said in the paper.
The scientists struggled to evaluate the public-health
measures and said they couldn't assess other efforts such as quarantines,
lockdowns and school closures because studies were too disparate. They called
for more research, saying their findings were limited by a lack of reliable and
comparable data.
An accompanying editorial in the BMJ said funding on
public-health measures accounts for just 4% of global COVID research.
"Considering the central importance of public health
and social measures for pandemic control, the uncertainties and controversies
around their effects, and the immense research effort being put into vaccine
and drug development, this lack of investment in public health measures is
puzzling," Paul Glasziou, the director of the Institute for Evidence-Based
Healthcare at Australia's Bond University, wrote in the editorial with
scientists from the UK and Norway.
Glasziou and his colleagues also sought to explain the
researchers' hand-washing finding - a surprising conclusion considering
coronavirus transmission in mostly airborne. The results may reflect how people
who wash hands frequently tend to take other steps as well.
"It is likely that hand-washing is a marker for several
protective behaviors such as avoiding crowds, distancing, and mask
wearing," they said.
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