For many years, scientists weren't sure if wearing a mask was effective at preventing the spread of viruses. However, recent studies suggest that they can help.
First, a 2008 study published in the International Journal of Infectious Diseases concluded that when used correctly, masks are highly effective in preventing the spread of viral infections. Family members of children with flu-like illnesses who used the masks properly were 80 percent less likely to be diagnosed with the illness. Surprisingly, the difference between types of masks used was insignificant.
Another study published in the Annals of Internal Medicine eported similar results. Researchers looked at 400 people who had the flu. They found that family members reduced their risk of getting the flu by 70 percent when they washed their hands often and wore surgical masks.
