Abstract:
Provided are a method and apparatus for decontaminating personal protective equipment while it is being worn by a person. A booth having a plurality of internally-reflective surfaces defines an interior space with dimensions suitable for receiving a standing person wearing the personal protective equipment. A plurality of UVC light sources are arranged to emit UVC light into the booth, and are operational while the person wearing the personal protective equipment is within the interior space. A door is selectively closeable to enclose the interior space and interfere with UVC light escaping the interior of the booth into an ambient environment of the booth, and a controller is operable to selectively operate the UVC light sources while the person wearing the personal protective equipment is standing within the interior space.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This application relates generally to a method and apparatus for decontaminating objects and, more specifically, to a method and enclosure in which clinicians wearing personal protective equipment are exposed to a decontamination agent to render the exposed surfaces of the personal protective equipment pathogen reduced. 
     2. Description of Related Art 
     Physicians, nurses, aid workers and other clinicians who treat patients with infectious diseases often wear personal protection equipment (“PPE”) to limit their exposure to the pathogen. During treatment, exposed surfaces of the PPE will often come into contact with the bodily fluids of patients, and become contaminated with the pathogen. Pathogens on the PPE can be carried to transitional areas where the clinicians remove their PPE, and remain viable to infect the clinicians and others within the vicinity for extended periods of time, thereby defeating the purpose of wearing the PPE in the first place. 
     Traditional decontamination efforts have included dousing the PPE in bleach or other disinfectant before the PPE is removed from the clinicians. Although effective, liquid disinfectants such as bleach commonly contain active ingredients such as sodium hypochlorite, which causes irritation of the clinicians&#39; airways and can cause skin burns. Further, in remote regions of the world liquid disinfectants may not be readily available for use, despite their potential side effects. 
     BRIEF SUMMARY OF THE INVENTION 
     Accordingly, there is a need in the art for an apparatus and method for rendering PPE pathogen reduced without first requiring removal of the PPE. Such an apparatus and method should limit the spread of a pathogen carried by the PPE to the clinician or another person without exposing the clinician wearing the PPE to harm from a decontamination agent. 
     According to an embodiment, the present disclosure includes a method of decontaminating personal protective equipment. Such a method includes, while a person wearing the personal protective equipment to be decontaminated is present within a booth having an internally-reflective surface, operating a plurality of UVC light sources arranged to emit UVC light into the booth. Operation of the UVC light sources is maintained while the person wearing the personal protective equipment is in the booth to expose surfaces of the personal protection equipment to the UVC light for a predetermined period of time suitable to achieve a desired level of decontamination of the surfaces of the personal protective equipment. The UVC light sources are de-energized after expiration of the predetermined period of time. 
     According to another embodiment, the present disclosure includes a decontamination apparatus including a booth having a plurality of internally-reflective surfaces that define an interior space having dimensions suitable for receiving a standing person wearing personal protective equipment. A plurality of UVC light sources are arranged to emit UVC light into the booth, and a door is selectively closeable to enclose the interior space and interfere with UVC light escaping the interior of the booth into an ambient environment of the booth. A controller is operable to selectively operate the UVC light sources while the person wearing the personal protective equipment is standing within the interior space. 
     The above summary presents a simplified summary in order to provide a basic understanding of some aspects of the systems and/or methods discussed herein. This summary is not an extensive overview of the systems and/or methods discussed herein. It is not intended to identify key/critical elements or to delineate the scope of such systems and/or methods. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later. 
    
    
     
       BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWING 
       The invention may take physical form in certain parts and arrangement of parts, embodiments of which will be described in detail in this specification and illustrated in the accompanying drawings which form a part hereof and wherein: 
         FIG. 1  is a perspective view of a decontamination booth in a closed state in which PPE worn by a clinician is to be rendered pathogen reduced; 
         FIG. 2  is a perspective view of the decontamination booth shown in  FIG. 1  in an open state, allowing the entry and exit of a clinician wearing PPE; 
         FIG. 3  is a partially cutaway view of a decontamination booth in which a clinician wearing PPE is being exposed to UVC light as a decontamination agent, wherein the clinician is standing on a platform  44  ( FIG. 3 ) that is substantially transparent to UVC light to expose the bottom of the clinician&#39;s footwear to the UVC light through the platform; 
         FIG. 4  is a flow diagram schematically depicting a method of decontaminating PPE while that PPE is being worn by a clinician following exposure to a pathogen; 
         FIG. 5  is a perspective view of a decontamination booth in an open state, and housing a portable UVC decontamination apparatus as the UVC source; and 
         FIG. 6  is a perspective view of two UVC bulbs connected in series. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Certain terminology is used herein for convenience only and is not to be taken as a limitation on the present invention. Relative language used herein is best understood with reference to the drawings, in which like numerals are used to identify like or similar items. Further, in the drawings, certain features may be shown in somewhat schematic form. 
     It is also to be noted that the phrase “at least one of”, if used herein, followed by a plurality of members herein means one of the members, or a combination of more than one of the members. For example, the phrase “at least one of a first widget and a second widget” means in the present application: the first widget, the second widget, or the first widget and the second widget. Likewise, “at least one of a first widget, a second widget and a third widget” means in the present application: the first widget, the second widget, the third widget, the first widget and the second widget, the first widget and the third widget, the second widget and the third widget, or the first widget and the second widget and the third widget. 
       FIG. 1  shows an illustrative embodiment of a decontamination booth  10  in which personal protection equipment (“PPE”)  12  ( FIG. 3 ) being worn by a clinician  14  can be decontaminated, thereby rendering the PPE  12  pathogen reduced. Rendering the PPE  12  “pathogen reduced” does not necessarily require the surfaces of the PPE to be 100% sterile, free of any and all living organisms that can viably reproduce. Instead, to be considered pathogen reduced, there must be a lower level of living contagions on the decontaminated PPE  12  capable of reproducing or otherwise causing an infection after performance of the decontamination process than the level that existed on the PPE  12  prior to performance of the decontamination process. For example, the exterior surfaces of the PPE  12  can be considered to be pathogen reduced if at least a 1 log 10  reduction of such contagions on the exposed surfaces remain infectious (i.e., no more than 1/10th of the biologically-active contagions originally on the exposed surfaces of the PPE  12  remain active or infectious at a time when the decontamination process is completed). According to yet other embodiments, the surfaces of the PPE  12  can be considered pathogen reduced once at least a 3 log 10  reduction (i.e., 1/1,000th) of such contagions on the exterior surfaces of the PPE  12  is achieved. 
     According to the embodiment shown in  FIG. 3 , the PPE  12  can include any protective garments and/or equipment worn to protect clinicians from pathogens, such as pants, jackets, gloves, overalls, coveralls, hazmat suits, goggles, masks, face shields, helmets, hats, shoes, shoe covers, self-contained breathing apparatuses, etc. Such articles of PPE  12  can optionally be airtight, and can optionally be substantially opaque to certain wavelengths of light. For example, the articles of PPE  12  can be substantially opaque to ultraviolet C (“UVC”) light, which is electromagnetic radiation with a wavelength from approximately 280 nm to approximately 100 nm. To be substantially opaque to this light, the articles  12  can block at least 90% of UVC light, and optionally at least 95% of UVC light imparted thereon. 
     The decontamination booth  10 , as shown in  FIGS. 1 and 2 , includes a rigid frame  16  that supports a shell  18  made from a flexible material to form a cubical enclosure in which the PPE  12  worn by the clinician  14  is to be exposed to a decontamination agent and rendered pathogen reduced. The frame  16  can be formed from a plurality of interlocking segments. For example, each segment can include both a male end and a female end. The segments can be assembled end to end by inserting the male end of one segment into the female end of another segment, optionally by hand and without the assistance of any tools. The segments can optionally be urged together, when assembled, by an elastic band that extends through an interior passage defined by each segment. But regardless of their configuration, the segments can be repeatedly disassembled without damaging the segments to allow for transportation of the decontamination booth  10  and assembled to support the shell  18  that will define the cubical, or other shaped of enclosure that can be closed to interfere with the escape of UVC light or other decontamination agent. 
     When relocation of the decontamination booth  10  is desired, the segments can be pulled apart and arranged parallel to each other or otherwise broken down into a size that fits into a bag or other portable container to be carried by hand. The decontamination booth can optionally be used in conjunction with a hand-held, battery operated UVC source (not shown) that can be used to emit limited quantities of UVC light for testing the UVC protection offered by the PPE  12  worn by the clinician  14 . For example, the hand-held, battery operated UVC source can be activated adjacent to a portion of the PPE  12  pulled away from the clinician  14  wearing it. A hand-held UVC meter can also be positioned adjacent to the portion of the PPE  12 , but separated from the hand-held, battery operated UVC source by the portion of the PPE  12  to give the clinician  14  a sense of the UVC blocking ability offered by the PPE  12  prior to the performance of a decontamination process within the decontamination booth  10  while wearing the PPE  12 . 
     For the sake of brevity and clarity, the decontamination agent will be described herein below as UVC light. One or a plurality of UVC light sources  20  (e.g., UVC bulbs) that emit UVC light to be directed toward the surface(s) to be rendered pathogen reduced can be supported within the decontamination booth  10 . As shown in  FIGS. 1 and 3 , a UVC light source  20  is supported by the frame  16  adjacent to each corner of the decontamination booth  10 , and adjacent to the ceiling  22  of the decontamination booth  10 . The UVC light source(s)  20  described herein can be operatively connected to a power plug that is to be inserted into a conventional AC mains electrical socket supplied with electricity by a public utility, for example. According to alternate embodiments, electric energy can be supplied by a rechargeable battery bank  25  ( FIG. 5 ) operatively connected to the UVC light source(s)  20 . Regardless of the power supply, embodiments of the decontamination booth  10  can include at least two, and optionally three or four UVC bulbs that can each optionally be independently controlled relative to the others. For example, each UVC source  20  can exhibit a minimum fluence of approximately 1 mW/s/cm 2 , or 145 mJ per five minute cycle measured at twenty five (25 in.) inches from the respective source  20 . 
     Embodiments of the UVC light sources  20  include UVC bulbs  20 A and  20 B that can be connected in series in an end-to-end arrangement as illustrated in  FIG. 6 . Each bulb  20 A,  20 B can optionally share a common configuration with the other bulb  20 A,  20 B. So configured, the bulbs  20 A,  20 B includes a cylindrical glass tube region  35  with a male electrical connector  37  provided to a first end and a female electrical socket  39  arranged at an opposite end along a longitudinal axis of the bulbs  20 A,  20 B. The male electrical connector  37  provided to the end of the bulb  20 B not shown in  FIG. 6  can be plugged into base with a compatible female electrical socket  39 . The base can optionally include a controller  50  described below, or at least a switch that allows an operator to turn the bulb  20 B on and off. The male electrical connector  37  of the other bulb  20 A, which can include a metallic contact or other plug feature as shown in  FIG. 6 , can be inserted into the female electrical socket  39 , which can include a sleeve lined with a metal substance or other electrical conductor, of the other bulb  20 A to establish an electrical connection between the bulbs  20 B,  20 A. Electric energy conducted between the female electrical socket  39  and the male electrical connector  35  energizes the bulb  20 A. The bulb  20 B plugged directly into the base is controlled by the controller  50  or other suitable control device and is considered to be the “master” bulb, while the bulb  20 A and any other bulb electrically connected to the master bulb  20 B are considered “slave” bulbs, as their operation is dependent upon, and limited to the operational state of the master bulb  20 B in the present example. 
     The shell  18  can be formed from any suitably-flexible material such as a woven fabric, cross-woven ballistic Nylon, and the like, or a combination including a plurality of different types of flexible material. At least a portion of the material forming the shell  18  can optionally be foldable, allowing the shell  18  to be broken down and optionally folded into a size that allows for transportation of the shell  18 , by hand, in a bag or other suitable container. When deployed, the shell  18  includes at least side walls  24 , a ceiling  22 , a floor  26 , and a door flap  28 . The interior dimensions of the decontamination booth  10  can be any desired value, allowing an adult human, for example, to stand therein without hitting their head on the ceiling. For such embodiments, the floor  26  of the decontamination booth  10  can measure approximately 4.5 ft. by 4.5 ft. (e.g., approximately 20 sq. ft.), and the side walls  24  can be at least approximately 7 ft. in height, however, the dimensions can vary to accommodate any object that is to be decontaminated within the decontamination booth  10 . For example, the interior of the decontamination booth can have a height of at least 6 ft. Alternate embodiments of the shell  18  can include at least one of: a window  30 , and one or more vents  32 . If present, the window  30  can optionally be formed of an optically transparent sheet of plastic, glass or other suitable material to allow an occupant of the decontamination booth  10  to view the environment outside of the decontamination booth  18 . Although optically transparent, the plastic, glass or other material forming the window  30  can block, or at least interfere with the transmission of UVC light, even while not concealed as described below. For instance, the material can block at least 90% of the UVC light, or at least 95% according to alternate embodiments. The one or more windows  30  can also optionally be concealed from outside of the shell  18  by a window flap  34  that, when closed, further interferes with the emission of UVC light from the source(s)  20  within the shell  18 . The window flap  34  can be formed of the same flexible material that is opaque to UVC light forming the other portions of the shell  18  (e.g., the walls  24 , ceiling  22  and floor  26 ), and can be secured in place over the window  30  through the use of any releasable fastener. For instance, the releasable fastener can include a zipper assembly that extends about a significant portion (e.g., ¾) of the periphery  36  of the window  30 . An additional window flap  38  can also optionally be arranged to cover the interior of the window  30 , to be opened and closed by the occupant of the decontamination booth  10  utilizing any suitable releasable fastener (e.g., zipper assembly about the periphery  40 ) that allows the additional window flap  38  to be repeatedly opened and closed to selectively grant access to the window  30  from the inside. 
     If present, the one or more vents  32  can form an aperture in a vertical wall  24  of the shell  18  to allow air to enter and/or exit the interior of the decontamination booth  10 . The vent(s)  32  can include a thermal vent  32   a  ( FIG. 2 ), through which air travels as a result of a temperature gradient between the interior of the decontamination booth  10  and the ambient, external environment of the decontamination booth  10 . According to alternate embodiments, the vent(s)  32  can optionally include one or more forced-air vents  32   b  ( FIG. 5 ), each including an aperture formed in a vertical wall  24  of the shell  18  in fluid communication with a fan, blower or any suitable air mover  17  ( FIG. 5 ) that is operable to move air into the interior of the decontamination booth  10  through the forced-air vent  32 . For example, the air mover  17  can move any suitable volume of air (e.g., 180 cfm) at a rate that can be exhausted through the one or more thermal vents  32   a , for example, so as to protect against undesirable inflation of the decontamination booth  10 . Each vent  32  can optionally and independently include a segment of material to interfere with the direct transfer of objects through the walls  24 , but such segments of material may optionally not hermetically seal the aperture of the respective vent(s)  32 . 
     The door flap  28  can also be formed from a segment of the same material from which the walls  24 , ceiling  22  and floor  26  are formed. And like the window flaps  34 ,  38 , the door flap  28  can be closed through the use of a releasable fastener such as a zipper assembly that extends at least partially (e.g., about ½ to about ¾ of the circumference) of the door flap  28  to allow for ready ingress to and egress from the decontamination booth  10 . The door flap  28  can optionally be configured to be manipulated from inside the decontamination booth  10  and from outside the decontamination booth  10 . For example, a zipper mechanism can include a handle segment that can be grasped from inside and/or outside of the decontamination booth  10 . 
     To further interfere with the escape of UVC light from within the decontamination chamber  10 , at least one, and optionally each releasable fastener utilized to secure the window flap(s)  34 ,  38  and the door flap  28  closed can optionally include a light shield  42 . An example of such a light shield  42  can include a strip of material that is opaque to UVC light, and extends over at least a portion of the zipper when the cooperating portions of the zipper are mated to maintain the window flap(s)  34 ,  38  and/or the door flap  28  closed. According to alternate embodiments, the zippers can include tightly-meshing teeth that, when mated, block substantially all of the UVC light emitted within the decontamination booth  10 . Thus, the decontamination booth  10  can block at least 95%, and optionally at least 99% of all UVC light emitted therein, preventing the blocked light from reaching the ambient environment of the decontamination booth  10 . 
     The inward-facing surface (e.g., the surface viewable from within the decontamination chamber  10  with all flaps closed) of at least one, optionally a plurality of or all portions (e.g., floor, walls, ceiling, flap(s), etc.) of the shell  18  can be provided with a reflective material that reflects UVC light. For example, the inward-facing surface(s) can be provided with an aluminized or otherwise metalized material, Mylar (e.g., stretched polyester film, also commonly referred to as biaxially-oriented polyethylene terephthalate or “BoPET”, for short) film, or any other suitable reflector of UVC light. 
     As shown in  FIG. 3 , the decontamination booth  10  can optionally include a platform  44 , false floor or other support on which the clinician  14  wearing the PPE  12  can stand to be supported at an elevation vertically above the floor  26  during a decontamination process. At least a portion of the platform  44  on which the clinician  14  stands can be formed from a material that is substantially transparent (e.g., degrades intensity of UVC light no more than 50%, or no more than 30% according to an alternate embodiment, or no more than 20% according to yet another embodiment) to UVC light. Thus, at least a portion of UVC light  46  emitted by the source(s)  20  and reflected upwardly by the reflective surface of the floor  26  can pass through the platform  44  to be imparted on the underside of the clinician&#39;s footwear  48 . 
     A controller  50  can also optionally be supported within the decontamination booth  10  to allow the clinician  14  to initiate a decontamination process and, optionally, manually terminate a decontamination process already underway. The controller  50  can include at least one of a start button  52  that can be pressed by the clinician  14  while inside the decontamination booth  10  to initiate a decontamination process during which the sources  20  are energized, a stop button  54  that can be pressed by the clinician  14  while inside the decontamination booth  10  to terminate a decontamination process to de-energize the sources  20 ; and a timer  56  that is operable to time a decontamination process and automatically (e.g., without human intervention) initiate termination of the decontamination process in response to expiration of a predetermined period of time to achieve the desired level of decontamination. For example, the timer  56  can be set for any desired length of time that, once expired, causes the sources  20  to be automatically de-energized. By default, the duration of the decontamination process as determined by the timer  56  can be established at five (5 min.) minutes, but other values can optionally also be utilized. Using the default value, once a decontamination process is initiated, the sources  20  will be automatically de-energized in response to expiration of the timer  56 . According to alternate embodiments, the duration of the decontamination process to be established by the timer  56  can be adjusted, and/or a plurality of pre-programmed durations can be included as default values of the timer  56 . For example, the timer  56  can optionally be provided with a plurality of buttons, each assigned a different, dedicated duration. Selecting such a button initiates the decontamination process and causes the sources  20  to be energized for the duration corresponding to the selected button. The timer  56  can optionally be capable of being programmed, in real time by a user and/or pre-programmed by a manufacturer, to conduct decontamination cycles as short as one minute, and as long as twenty four (24 hr.) hours. 
     The controller  50  can optionally also be provided with a sensing component that can receive a signal or otherwise sense a breach of the decontamination booth  10  while a decontamination process is underway. For example, the controller  50  can be provided with a light sensor that can detect certain changes in light (e.g., changes in the level of visible light outside of the UVC range) within the decontamination chamber  10 . The controller  50 , based on such sensed light gradients, can determine that the door flap  28  has been opened and terminate the decontamination process to de-energize the sources  20 . Of course, a light sensor is but one of several suitable sensors that can be utilized by the controller  50  to determine that the sources  20  are to be de-energized. According to an alternate embodiment, the controller can include a motion sensor trained on the door flap  28 . If the door flap  28  is opened such a motion sensor will sense this condition and transmit a signal to cause the controller  50  to de-energize the source(s)  20 . According to another illustrative embodiment, a sensor in communication with the zipper provided to the periphery of the door flap  28  can sense when the zipper is opened, and again transmit a signal to cause the controller  50  to de-energize the source(s)  20 . According to another embodiment, the controller  50  can be in communication with (e.g., via a wireless communication channel and/or hardwired to) a remotely-located (e.g., located and accessible by an operator outside of the decontamination booth  10 ) fob  51  ( FIG. 3 ) or other remote control to receive a manually-entered termination instruction that causes the controller  50  to terminate an active decontamination process and de-energize the source(s)  20 . The fob  51  or other remote control device can be limited to only an “ON” button  57  that activates a decontamination process, only an “OFF” button  55  that terminates a decontamination process, or a combination thereof. 
     Although the embodiments described above include the sources  20  of UVC light installed on the frame  16  as part of the decontamination booth  10 , alternate embodiments can include a plurality of sources  20  provided to a portable UVC decontamination apparatus  21  ( FIG. 5 ) that is placed inside the decontamination booth  10  along with the clinician  14 . An example of such a portable UVC decontamination apparatus  21  is described in U.S. Pat. No. 9,095,633 to Dayton, which is incorporated in its entirety herein by reference. According to such embodiments, the decontamination booth  10  can be as described above, but separate from the sources  20  and optionally the controller  50 ′, which can be provided to the portable UVC decontamination apparatus  21  itself as shown in  FIG. 5 . The portable UVC decontamination apparatus  21  of such embodiments can be independently arranged within the interior of the decontamination booth  10 , as desired, and closed therein when the door flap  28  is closed. The one or a plurality of sources provided to such a portable UVC decontamination apparatus  21 , each adjacent to an end of an adjustable arm such that the position of each source  20  can be adjusted relative to each other, and can be energized and optionally de-energized as described herein to achieve the desired level of decontamination, with the primary difference being that the portable UVC decontamination apparatus  21  can be arranged independently of the decontamination booth  10 . Further, the position of each of a plurality of UVC light sources  20 ′ provided to the portable UVC decontamination apparatus  21  can be independently adjusted relative to each other. Such adjustments can be achieved through manipulation of joints and/or other portions of adjustable arms  27  coupling the UVC light sources  20 ′ to a base  29  of the portable UVC decontamination apparatus  21 . The adjustable arms  27  allow for adjustment of the positions of the UVC light sources  20 ′, even while the UVC light sources  20 ′ are operational (e.g., emitting UVC light). 
       FIG. 4  is a flow diagram schematically depicting a method of decontaminating the PPE  12  while it is being worn by the clinician  14  following possible exposure to a pathogen. As shown in  FIG. 5 , a placard  19  can optionally be secured to a wall  24  within the decontamination booth  10  and display to a person therein instructions on how to properly decontaminate PPE being worn by that person. The placard  19  can optionally guide the person in performing the following method. At step S 100 , the clinician  14  wearing the PPE  12  departs a location where a patient with an infectious disease is examined and enters the decontamination booth  10  through the open door flap  28  before the PPE  12  is removed. The clinician  14  or other person can then adjust the zipper to close the door flap  28  and close the interior window flap  38  provided to any open windows from within the decontamination booth  10 . The clinician can also optionally stand atop of the platform  44 , if present, to promote exposure of the clinician&#39;s footwear to reflected UVC light  46  during the decontamination process. 
     At step S 110 , an instruction can be input to the controller  50  to commence the decontamination process and energize the sources  20  while the clinician  14  wearing the PPE  12  is enclosed within the decontamination booth  10 . This instruction can originate from any of the sources described herein, such as the start button  52  of the controller  50 , a remotely-located fob, or any other suitable control device. 
     Once the decontamination process has begun, the timer  56  can monitor how long the sources  20  are active at step S 120 , maintaining operation of the sources  20  while the clinician  14  remains in the decontamination apparatus for a predetermined period of time that will achieve a desired level of decontamination. The clinician  14  can remain in the decontamination booth  10  while the sources  20  are energized without fearing harmful side effects of UVC exposure because the PPE  12  blocks virtually all of the UVC light, thereby preventing the UVC light from reaching the clinician&#39;s skin. Accordingly, the PPE  12  should offer full body protection, fully insulating the clinician  14  from the sources  12 . 
     At step S 130 , one or more sensors can optionally monitor changes in visible light, motion within the decontamination booth  10 , etc. to determine whether the light integrity of the decontamination booth  10  has been breached since the decontamination process was initiated. If so, the controller  50  can terminate the decontamination process and de-energize the sources  20 . If not, however, the decontamination process is allowed to continue through expiration of the period established by the timer  56 , at which time the sources  20  are de-energized and the clinician can exit the decontamination booth  10  at step S 140 . According to alternate embodiments, monitoring the integrity of the decontamination booth  10  to protect against the escape of UVC light to an ambient environment where others who are not protected by the PPE  12  could be exposed to escaping UVC light can include monitoring a status of the door flap  28  to detect when the door flap  28  has been opened. Such monitoring can be performed by sensing a status of a zipper assembly or other closure mechanism to determine when the door flap  28  has been opened or otherwise breached during a decontamination cycle. Similar monitoring can be performed to determine if a window (e.g., monitoring a zipper assembly or other closure device) has been breached in a manner that could potentially allow UVC light to escape the interior of the decontamination booth  10 . Regardless of the type of monitoring performed, the sensing of any condition that could potentially allow UVC light to escape from the interior of the decontamination booth  10  into an unprotected ambient environment (e.g., where other people who are not wearing PPE  12  may be present) can result in premature (e.g., prior to successful completion of the decontamination cycle) termination of the decontamination cycle. 
     Although described above as decontaminating PPE  12  worn by a clinician  14  for the sake of brevity and clarity, the present disclosure is not so limited. Instead, the decontamination booth  10  and methods described herein can also be utilized to decontaminate inanimate objects such as wheelchairs, for example, as well. 
     Illustrative embodiments have been described, hereinabove. It will be apparent to those skilled in the art that the above devices and methods may incorporate changes and modifications without departing from the general scope of this invention. It is intended to include all such modifications and alterations within the scope of the present invention. Furthermore, to the extent that the term “includes” is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term “comprising” as “comprising” is interpreted when employed as a transitional word in a claim.