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A randomized controlled trial (N=341,830) conducted by IPA, @mushfiq_econ, Jason Abaluck, doctors and mask engineers from Stanford Medicine with Bangladesh health researchers and officials increased mask wearing by a lot, and the behavior maintained after the intervention ended

Promoting mask-wearing is an extremely cost-effective way to save lives in regions where a high-fraction of the population is unlikely to be vaccinated in the medium-term.

Companion dos & don'ts brochure multitasks for States & CBOs distributing free masks...folding into gift envelope to reinforce the norm of reciprocity & encourage recipients to say YES later when asked to wear a mask in public! Clever ppl:Pavan Mamidi @GPGautamPatel Sailee

With dozens of researchers at Yale, Stanford, Berkeley and IPA and several other organizations, we ran a cluster randomized trial involving almost 350,000 people and 600 villages in Bangladesh to assess the impact of community masking on COVID.

This is arguably the most important single piece of epidemiological research of the entire pandemic. A MASSIVE randomized trial launched a pro-mask campaign in some Bangladeshi villages, but not others. The result: masking villages got less COVID. poverty-action.org/sites/default/…

Study in Bangladesh showed program encouraging mask-wearing increased usage 28% & that group saw a 9.3% reduction of #Covid19. Research by @mushfiq_econ EGC/Yale Department of Economics/Yale School of Management/Y-RISE, Jason Abaluck, Stanford Medicine Innovations for Poverty Action a2i, et al. washingtonpost.com/world/2021/09/…

The truly fascinating thing about this study is that it wasn't an RCT of masks, but an RCT of *masking policy*. And yet, with all the behavioral vagaries implicit in that, it still found a decent significant effect. See Derek's good analysis for more.

med.stanford.edu/news/all-news/…

On “Babbage”, Laura Kwong, a public-health researcher at UC Berkeley, talks to Kenneth Cukier about how the largest-ever investigation of mask efficacy, conducted in Bangladesh, found simple ways to encourage people to mask up econ.st/3k8qj7x

Hope everyone's got your surgical masks at the ready! Our study finds strong evidence that surgical masks work well to reduce COVID-19. Surgical masks can also be washed and reused! (data on this coming out soon)

Very grateful to all the study participants in Bangladesh, the other PIs @mushfiq_econ Ashley Styczynski , and all the hard-working staff at Innovations for Poverty Action as well as gov of BD partners. Wear a surgical, KF94, KN95, or N95 mask if you can!

Masks work to prevent COVID. It is just as important as ever to wear a good mask (surgical, KF94, KN95, N95). Glad to work with Innovations for Poverty Action Jason Abaluck @mushfiq_econ Ashley Styczynski and Steve Luby for these solid research findings, published today science.org/doi/10.1126/sc…

From a nerdy person I admire Emily S Gurley "I treat Twitter like wastewater surveillance. Some bits are interesting, but most of it you want to flow by."

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Now out in PLOS Medicine, follow-up of the #WASH Benefits Bangladesh trial #sanitation intervention, Jesse Contreras Ayse Ercumen + icddr,b team found diarrhea reduction sustained up to 3.5 years, even after promotion ceased. Lessons for #sustainability dx.plos.org/10.1371/journa…

Looking for a post-doc who is a US citizen and wants to live in Bangladesh for 9 months researching environmental health and/or mental health as a Fogarty Fellow at UC Berkeley! Send me your CV. medicine.yale.edu/yigh/ghes/ globalenvhealthequitylab.wordpress.com