"Through air, coughing specifically, not to be gross but we think it bonds to the droplets that eject from the body during coughing and sneezing. We ran out of enough atmofilters and spare filters a long time ago, and the disease more or less ravaged the community. E veryone left here from the original people living in Henge had a natural immunity for recovering from the disease. We made a vaccine based on that, but we don't have the kind of lab set up you really need to mass produce something like that.
I would say with all the immigrants coming in, maybe 1 in 4 is immune now, between the original people getting sick, and those who were inoculated later. We're sitting on a hotbed of it spreading again.
Otherwise, food and water are also becoming thin here. We're supporting far more people than this region was ever intended to support. We're on rationing, supplies will hold for another month or two, but morale is low due to the hunger"