The rooms are apparently in an older section of the hospital and covered with a kind of wallpaper that can trap moisture and condensation. This wallpaper was a construction standard in the 1990s but has proved to be a sponge for water and thus cause mold. It is likely that some water intruded through the windows in these rooms and was absorbed into the wallpaper. After the drywall is replaced, the hospital plans to paint instead of use wallpaper as it does in newer sections of the hospital. It seems the hospital will simply remove the moldy material rather than seek assistance from a commercial mold remediator.