Abstract: A system for improving indoor air quality for shared and confined spaces with people. This allows an improvement in surrounding air quality in indoor spaces and interaction situations with (i) groups of people among themselves (inter-person transmission), (ii) between people and the above-mentioned indoor spaces (confined spaces, buildings and/or airborne and/or overland and/or seaborne passenger transportation systems and/or confined patient transportation systems such as pods/incubators and others similar thereto), and also (iii) for interaction between people and invasive and non-invasive mechanical ventilation systems. The system proposes the use of a system based on fluid mechanics and UV wavelengths for inactivating viruses and bacteria.