Randomized trial of a whole bunch of 1000’s in Bangladesh finds masking marketing campaign decreased COVID-19 infections

A masks promotion marketing campaign in villages in Bangladesh modestly lowered COVID-19 infections, in accordance to an enormous new research that’s the first of its form.

Performed by researchers from Yale College, Stanford College, the College of California, Berkeley, and nonprofit group Improvements for Poverty Motion, the research employed a randomized managed trial thought of the gold customary in medical analysis.

“Neighborhood-wide masking could be a particularly efficient software to fight COVID,” tweeted Jason Abaluck, a Yale professor of economics who co-authored the research.

The researchers randomly assigned 600 villages in Bangladesh to 2 teams, with households in half of the villages receiving free masks, in addition to schooling and coaching on correct masks use. The opposite half of the villages, the management group, didn’t obtain any masks schooling. Researchers monitored the villages for masks use within the following weeks.


The research discovered that the speed of mask-wearing was about 42% within the remedy villages, however solely 13% within the management villages.

Over 335,000 individuals within the villages stuffed out surveys asking in the event that they skilled any COVID-19-like signs, and over 27,000 mentioned that they had. About 40% of those that mentioned that they had signs consented to blood assessments.

The blood assessments revealed that 0.76% of villagers within the management group examined constructive for COVID-19 versus 0.69% within the remedy villages, a discount of 9%.

The “intervention demonstrates a scalable and efficient technique to advertise masks adoption and scale back symptomatic SARS-CoV-2 infections,” the researchers concluded.

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The research additionally examined surgical masks versus material ones. There was no distinction in infections amongst villages that used material masks versus management villages, however there was an 11% drop in infections amongst villages that used surgical masks.

The research has a number of limitations. As a result of researchers didn’t take blood samples from those that didn’t report signs, the research was unable to find out if delicate or asymptomatic infections had been greater amongst villages with decrease charges of masks use. Nor might the research rule out the likelihood that those that consented to blood assessments had been in some necessary method completely different between the remedy and management teams, thereby biasing the outcomes.

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