One aspect of the invention provides a mobile clinic including: an intermodal container defining at least a first opening and a second opening； a partition wall located within the intermodal container, the partition wall separating the intermodal container into an anteroom and a treatment room； and an access control device programmed to prevent passage from the anteroom into the treatment room until a user's donning of personal protective equipment is verified. Another aspect of the invention provides a collapsible structure including: a rigid base； a rigid roof； one or more collapsible walls extending between the floor and the base； and an erector system comprising four cross-bars. Another aspect of the invention provides a crate including: a bottom panel； a top panel； and a plurality of walls, wherein at least two of said plurality of wails including one or more conduits.
