Most shelter systems are based on a congregate model. That is, individuals maybe have a cot on the floor and you'll see a number of beds in one room. There's very little of the bathroom space or washroom space that would be appropriate for individuals. It's often shared among the larger group. The arrangement of the shelter set-up is therefore ripe for transmission of COVID or a disease of this nature.
On June 19th, 2020. See this statement in context.