Wearing face masks reduces the number of times that people touch their faces — particularly their eyes, nose and mouth — in public, a behavioral change that may help prevent the transmission of COVID-19, according to a study published Wednesday in JAMA Network Open. In countries where mandatory mask-wearing policies were implemented early in the pandemic and where compliance with those policies has been high, the reduction in face-touching has been particularly dramatic. People in China, for example, put their hands to their faces four times less often, and people in South Korea do it six times less often since mask-wearing became mandatory, the study reports. These findings support those of another, smaller study published online earlier this month. That study found that health care workers in the United States touched their faces four times less often when wearing face masks than when not wearing them. Health officials believe facial coverings can play an important role in limit