In Black River Falls the non infected people could be around the infected people but if they were too close to them they could get it. So they used gas mask to be close to the infected people. It was an air born illness so that why they used gas mask.
US-based hobbyist artist Kim Nguyen has been working on a collection of illustrations, called ‘Anthros‘, that depict animals with human personalities. Be sure to visit here and here to find more of her anthropomorphic animals.