Abstract: With respect to pandemics, restaurants, stadiums, cafeterias, and bars are among the most dangerous places to socialize due to the form of interaction. Exchange of bacteria and viruses are facilitated intensively from the mouth and nose via air transport in droplets of saliva and bodily fluids being deposited on surfaces, foods, and in the air. The present development creates a comfortable environment where the air-space of each customer is separated by invisible cold-hot air and vis-UV barriers, which take away bacteria and viruses, destroying them and preventing recirculation while offering pleasant, clean, and sanitized ambient conditions for a face to face meeting. An immersive experience can be provided with surrounding screens and gas therapy that may be customized according to the customer's preferences. Food distribution is performed with a robotic shuttle system and when the customer departs, an extensive cleanup is performed using chemicals and UV irradiation through robotic systems.

Abstract: During national crisis as virus pandemics, bio-terrorism, chemical pollution, a response is to lock down all the economy, with several % GDP loss, or to convince population to wear, reasonably, appropriate individual anti-virus and bacterial protection accessories, made of a full head and shoulders protection mask, equipped with air ventilation and processing unit, and gloves, and body protection foil, for single or multiple use, and get minimal economic losses. The air processing unit may be developed a modular structure, starting from a simple filtered fan, with air suction on top of the head, flowing air over the face, for low probability of contamination environments, upgraded to a more complex unit including heat pipe, catalytic organic matter reduction, oxygen generator and closed circuit breathing unit, that may be integrated into a full body personal protection equipment by extending the functions of temperature, humidity and pressure control to full body, for hazardous environments.

Abstract: COVID-19 is a large virus with remarkable resilience, propagation and multiplication features that require complex technologic systems and manners to assure a reasonable protection. A transparent, multiuse face mask with valves and for inhalation of air from a specialized filter placed in a cleaner air space, and an exhalation valve that drives the exhaled air via a tube to a filter bladder placed on wrist and from there to a tube that has the release end near ground, or can be connected to the aspiration tube of the infrastructure, that removes it, preventing recirculation. The general convention that defines the usage method is that the building, buss, and any other enclosure provide clean antiseptic air above and consumer s have to release their exhalations down near floor from where the structure to remove them by a controlled air flow similar to clean rooms.