Provided is an apparatus for disinfecting objects of various shapes and sizes. The apparatus includes a housing enclosing a disinfecting chamber, and an ultraviolet light source arranged to emit ultraviolet light into the disinfecting chamber to deactivate at least a portion of a biologically-active contagion present on the object. A peripheral wall of the housing that extends about a portion of the disinfecting chamber comprises an ultraviolet-reflective material so that the ultraviolet light impinging on the peripheral wall is reflected generally away from the peripheral wall and toward an interior of the disinfecting chamber. A door is adjustable between open and closed orientations. A floor at the bottom of the disinfecting chamber includes an ultraviolet-reflective surface that reflects the ultraviolet light impinging on the floor generally away from the floor toward the interior of the disinfecting chamber.