WAS 500: This multifunction vehicle enables both intensive care patients and obese or infectious patients to be transported thanks to the generous space available. The securing rails embedded in the floor of the vehicle make it possible both to securely load various bariatric or intensive care stretcher systems and also to transport patients in hospital beds. The patient can be moved into the vehicle gently using the tail lift. A specially developed air-treatment system constantly conditions and filters both the air in the patient compartment and the air flowing in and out. During transport, the system ensures a constant low pressure in the patient compartment, completely automatically, making the transportation of highly infectious patients possible. An integrated gassing unit provides the possibility of hygienically treating the vehicle without the risk of disease transmission.