COVID19 Public & Occupational Health Signage Campaign.  Exercising the pattern of public beliefs about "used" items being highly undesirable, or even sick-making, such as used gum, used tissue, used cups, used condoms, etc., this project's approach attempts to increase Covid protocol adherence creating the cognitive association of "used air = icky/harmful."  To disambiguate the notion of not just unpleasant but dangerous, the well-ingrained and easily recognizable symbolism capital of caution sign aesthetic bolsters the message.