A machine that measures the distance from the wearer to surrounding people and animals.
 
It is prescribed by health organizations and can be bought independently for self-protection. The machine defines distances in times of imminent epidemics using ultrasonic sound and makes an alert if someone intrudes into the private zone (1.45 to 2 meters). It uses acoustic signals via a speaker system, protecting by releasing a mask. It creates a secured micro-space in crowded environments.
 
The device conforms to the collective social desires of health, hygiene, privacy, control and safety by taking the responsibility away from the individual and on to the machine, it asks questions about who is in control of contagiousness.