When I went to Walmart, most had masks on, but only half were wearing them correctly. I saw many with the nose out, and some under their chin. I make sure to keep away from these folks. With widespread mask wearing, and social distancing, the mask can indeed help protect the wearer, as there will be fewer germs for the mask to block. As usual, the scientists aren't sure, but many believe that the infectious dose plays a big role as to how sick you become. If this is true, wearing a mask would indeed help the wearer, as even if the mask lets enough virus through to infect you, it certainly would block much virus, lowering the infectious dose.