Loss of smell occurs in 86% of mild cases of COVID-19

In a study of 2581 patients from 18 European hospitals, olfactory dysfunction

was 85.9% in mild cases of COVID-19, 4.5%in moderate cases and 6.9% in severe and critical cases. The average duration of olfactory dysfunction reported by patients was 21.6 days, but nearly a quarter of affected patients reported that they had not recovered their sense of smell 60 days after losing it.

Objective clinical studies have revealedolfactory dysfunction in 54.7% of mild cases of COVID-19 and 36.6% of cases of COVID-19 from moderate to critical. After 60 days and 6 months, 15.3% and 4.7% of these patients did not objectively recover their sense of smell, respectively.

Olfactory dysfunction is more common withmilder forms of COVID-19 than those in moderate to critical forms, and 95% of patients regain their sense of smell 6 months after infection, said study lead author Jerome R. Lechien, MD. PhD, MS, Saclay University of Paris.

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