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Objective We review the effects of COVID-19 on the human sense of smell (olfaction) and discuss implications for human-system interactions. We emphasize how critical smell is and how the widespread loss of smell due to COVID-19 will impact human-system interaction. Background COVID-19 reduces the sense of smell in people who contract the disease. Thus far, olfaction has received relatively little attention from human factors/ergonomics professionals. While smell is not a primary means of human-system communication, humans rely on smell in many important ways related to both quality of life and safety. Method We briefly review and synthesize the rapidly expanding literature through September 2020 on the topic of smell loss caused by COVID-19. We interpret findings in terms of their relevance to human factors/ergonomics researchers and practitioners. Results Since March 2020 dozens of articles have been published that report smell loss in COVID-19 patients. The prevalence and duration of COVID-19-related smell loss is still under investigation, but the available data suggest that it may leave many people with long-term deficits and distortions in sense of smell. Conclusion We suggest that the human factors/ergonomics community could become more aware of the importance of the sense of smell and focus on accommodating the increasing number of people with reduced olfactory performance. Application We present examples of how olfaction can augment human-system communication and how human factors/ergonomics professionals might accommodate people with olfactory dysfunction. While seemingly at odds, both of these goals can be achieved.

<p>This paper explores the types of verbal irony employed by resilient youth in spontaneous conversation and examines how they use this irony to navigate potentially challenging psychosocial terrain. We documented and analyzed instances of irony in the spontaneous speech of adolescent participants in an international, ecological study of resilience using quasi-naturalistic and participatory visual methods. We found irony to be co-constructively utilized by the youths we studied. They spontaneously used many types of irony to mute criticism and avoid embarrassment. These resilient youth, who were thriving under adverse circumstances, used irony in a positive way to facilitate affiliation with their friends and family.</p>