An aircraft comprising: an interior ; a plurality of sensors configured to detect one or more conditions of the interior ; an environmental system configured to circulate air through the interior ; at least one disinfectant dispenser configured to automatically dispense a disinfectant in the air circulated through the interior ; a disinfectant delivery device in fluid communication with the at least one disinfectant dispenser , wherein the disinfecting delivery device is configured to deliver the disinfectant to the at least one disinfectant dispenser ; and a disinfectant controller in communication with the disinfectant delivery device and configured to selectively initiate or selectively terminate delivery of the disinfectant from the disinfectant delivery device to the at least one disinfectant dispenser ; wherein the environmental system comprises an air handling device configured to generate an airstream that circulates the air through the interior , andthe disinfectant controller is in communication with the air handling device and is configured to selectively activate or selectively deactivate the air handling device ; wherein the disinfectant controller is configured to, upon a predetermined condition, automatically purge the disinfectant from the interior , wherein purging the disinfectant from the interior comprises terminating delivery of the disinfectant and continuing to circulate the air through the interior of the aircraft , wherein purging the disinfectant continues until the concentration of the disinfectant in the interior is reduced to below a predetermined threshold, and the disinfectant controller is further configured to detect, using the plurality of sensors that a disinfectant mixture is purged from the interior , and generate an indicator that the interior is safe for re-entry. an interior ; a plurality of sensors configured to detect one or more conditions of the interior ; an environmental system configured to circulate air through the interior ; at least one disinfectant dispenser configured to automatically dispense a disinfectant in the air circulated through the interior ; a disinfectant delivery device in fluid communication with the at least one disinfectant dispenser , wherein the disinfecting delivery device is configured to deliver the disinfectant to the at least one disinfectant dispenser ; and a disinfectant controller in communication with the disinfectant delivery device and configured to selectively initiate or selectively terminate delivery of the disinfectant from the disinfectant delivery device to the at least one disinfectant dispenser ; wherein the environmental system comprises an air handling device configured to generate an airstream that circulates the air through the interior , andthe disinfectant controller is in communication with the air handling device and is configured to selectively activate or selectively deactivate the air handling device ; wherein the disinfectant controller is configured to, upon a predetermined condition, automatically purge the disinfectant from the interior , wherein purging the disinfectant from the interior comprises terminating delivery of the disinfectant and continuing to circulate the air through the interior of the aircraft , wherein purging the disinfectant continues until the concentration of the disinfectant in the interior is reduced to below a predetermined threshold, and the disinfectant controller is further configured to detect, using the plurality of sensors that a disinfectant mixture is purged from the interior , and generate an indicator that the interior is safe for re-entry. <EOS>