Methods, assays, and apparatus are disclosed for testing of antigens associated with intestinal andor blood-brain barrier permeability. It is provided that the gas sensor is arranged at a narrow point andor in an area of turbulent flow of an air guidance channel of the ventilation system. The method continues by transferring the first video data at a first data rate from the video processor to a remote video processor, receiving a control signal, and processing the video data to produce second video data of the scene at a second quality level in response to the control signal in the video processor, where the second quality level is greater than the first quality level. Therefore, new drugs for the treatment apoptosis may be found.