Medical diagnostic devices for identifying antigens in blood, urine, saliva, serum, cerebral spinal fluid, sweat, and sputum; Medical diagnostic devices, namely, medical diagnostic apparatus for testing for viruses; Medical diagnostic equipment, namely, portable testing instruments in the nature of hand-held and bench-top instruments to test diagnostic cartridges for identifying antigens in blood, urine, saliva, serum, cerebral spinal fluid, sweat, and sputum; Medical diagnostic equipment, namely, portable testing instruments in the nature of hand-held or bench-top instruments to test diagnostic cartridges for identifying antigens in blood, urine, saliva, serum, cerebral spinal fluid, sweat, and sputum; Medical diagnostic system comprised of medical diagnostic bench-top and hand-held instruments, test cartridges, and test sample collection vials used to detect and measure antigens and antibodies; Medical diagnostic system comprised of medical diagnostic bench-top or hand-held instruments, test cartridges, and test sample collection vials used to detect and measure antigens and antibodies; Medical devices, namely, portable diagnostic platforms comprised of medical diagnostic bench-top and hand-held instruments, test cartridges, and test sample collection vials for detecting, measuring and analyzing body fluids and human biological samples; Medical devices, namely, portable diagnostic platforms comprised of medical diagnostic bench-top or hand-held instruments, test cartridges, and test sample collection vials for detecting, measuring and analyzing body fluids and human biological samples; Diagnostic kits comprised of test cartridges and test sample collection vials for use in antigens and antibodies testing for clinical, research, or medical use