Masks _might_ cause some people to reduce distancing, and they might cause some people with symptoms to stop isolating and leave home. We don't know if they do

Masks _might_ cause some people to reduce distancing, and they might cause some people with symptoms to stop isolating and leave home. We don't know if they do. We have good evidence that distance is important. We have poor evidence that masks work. We think masks work. They have a plausible mechanism of action, but we struggle to find benefit from the RCTs that have been done, and we have to use other statistical methods on existing data to find a benefit. We need better data for masks. https://www.thelancet.com/action/showPdf?pii=S0140-6736(20)31142-9 https://www.thelancet.com/action/showPdf?pii=S0140-6736(20)3...