As a former homeless person, I have great concern for sanitation. Where is a toilet? That was my greatest concern when I was homeless, where to go to the bathroom.
In North Las Vegas we had a Hepatitis Type D problem at the Salvation Army, which briefly shut down the Salvation Army dining facilities.
Hepatitis D is the only form of Hepatitis that is able to be spread airborne, and when it was discovered, it was traced to the Union Pacific railroad track beside the dining facility where someone with Hepatitis D had been sleeping and defecating. They closed the dining facility for two weeks, fenced off the track from the dining facility, and sprayed some sort of disinfectant on the area.