An Investigation Into The Basis For The Loss Of Smell As An Early Symptom Of Covid-19

The loss of the sense of smell and taste has proven to be the most reliable indicator of early infection of the SARS-CoV-2 virus. Between 25% and 50% of people report anosmia and ageusia as the very first symptom of Covid-19. Studies of patient records around the world find that the loss of smell or taste is more than twenty times as likely to predict a SARS-CoV-2 positive PCR than a fever, cough, or a stuffy nose. That is very likely because fevers and coughs are associated with many illnesses other than Covid-19. 

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Originally published on Forbes (July 27, 2020)

© William A. Haseltine, PhD. All Rights Reserved.