Noted: Research by Scott Sanders, a professor in the mechanical engineering and electrical and computer engineering departments at the University of Wisconsin-Madison, has shown that in situations where people can social distance, three-layered masks are best, with cotton for the internal layer, a non-woven synthetic for the middle and an outer layer of polyester.
But even if there is leaking from the mask, some kind of barrier is better than nothing, said Ajay Sethi, an associate professor of population health sciences at UW-Madison.
And, the masks should really be combined with social distancing, added Sethi, who is part of a team developing a model to forecast potential surges in hospitalizations in southern Wisconsin.