Olfactory dysfunction (OD) is one of the most common
symptoms of acute and long COVID-19.1,2 Qualitative OD
frequently accompanies or follows quantitative olfactory
loss.3 Few studies to date have combined both qualitative
and quantitative evaluation of OD.4 The aim of
this study was to estimate the prevalence of qualitative
OD and evaluate its functional impact in post–COVID-19
patients by combining a validated questionnaire5 and a
comprehensive olfactory psychophysical evaluation.
