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An easily-constructed and self-administered olfactory acuity test for pre-symptomatic indication of infection by COVID-19 is described This paper offers a simple test of smell threshold, which can be made and conducted at home and re-tested on oneself or others sharing isolation, and producing numerical data to indicate whether smell ability has decreased During the COVID-19 pandemic, and until a vaccine is developed and available, becoming aware immediately of a loss of the important chemical sense, olfaction, can signal sufficient concern in individuals to self-isolate for the requisite period The risk of COVID-19 spreading through communities can be reduced by promoting smell awareness by everyone, using simple, inexpensive measures, suggested in this paper © 2020, Royal Society of New South Wales
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