A large, randomized trial led by researchers at Stanford Medicine
and Yale University has found that wearing a surgical face mask
over the mouth and nose is an effective way to reduce the
occurrence of COVID-19 in community settings.
It also showed that relatively low-cost, targeted interventions to
promote mask-wearing can significantly increase the use of face
coverings in rural, low-income countries. Based on the results,
the interventional model is being scaled up to reach tens of
millions of people in Southeast Asia and Latin America over the
next few months.
You might be tempted to file this under “Duh”, but it’s essential to actually study things like this rigorously. It was just 18 months ago, at the outset of the pandemic, when the CDC and other health organizations were saying people shouldn’t bother with face masks.