Something simple and cheap that doesn’t require being poked with a needle. And it works!
…
This week, a group of scientists from Yale, Stanford, UC Berkeley, and other institutions published the final results of a randomized study of community-wide masking behavior in Bangladesh. The study encompassed roughly 350,000 people in 600 villages. The researchers randomly selected certain villages for an intervention that included giving out free masks, paying villagers to remind people to cover their face, and having village leaders and religious figures such as imams emphasize the importance of masks. The researchers also paid villagers to count properly worn masks in public places, including markets and mosques. To gather data on coronavirus transmission, the team asked about symptoms and conducted blood tests to determine who came down with COVID-19 over the course of the study.Their conclusion? Masks work, period. Surgical masks are particularly effective at preventing coronavirus transmission. And community-wide mask wearing is excellent at protecting older people, who are at much higher risk of severe illness from COVID-19.
…
But the Bangladesh study is still perhaps the most important research done during the pandemic outside of the vaccine clinical trials, because it gives us randomized-trial data to bolster the flimsier assumptions and conclusions of observational research. We finally have a sense of not just whether masks work but how much universal masking could reduce transmission. The answer is: quite a lot.
…
My bold.