RESULTS AND DISCUSSION
One-hundred and five patients presenting with COVID-19-related OD were recruited in the study based on subjective symptoms two weeks after symptom onset. Based on the identification-sniffing test, 28 patients were still anosmic, 24 were hyposmic and 53 had recovered from their olfactory symptoms and were normosmic. Clinical and demographic characteristics of the patients are shown in Table I . Patients included in the three study groups were comparable. Anosmic and hyposmic patients were grouped for the virological and immunological analyses presented below and are referred to as anosmic.