COVID-19 induced anosmia and hyposmia persist for months in affected patients
the verdict
SUPPORTED
the evidence backs this
confidence 88/100
Multiple clinical studies and reviews substantiate that COVID-19-induced anosmia and hyposmia can persist for months or even years as part of long-COVID syndrome.
Evidence for · 7
Pathophysiology of Post-COVID syndromes: a new perspective
2022 · cited by 105
This review highlights that olfactory disorders are among the persistent symptoms of post-COVID syndrome lasting for months.
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More for · 6
Post-viral olfactory loss and parosmia.
2023 · cited by 21
The paper notes that the incidence of long-term post-viral olfactory loss after SARS-CoV-2 infection affects a substantial proportion of patients.
Prefrontal dysfunction in post-COVID-19 hyposmia: an EEG/fNIRS study
2023 · cited by 15
This study evaluates patients with persistent hyposmia at least 12 weeks after acute SARS-CoV-2 infection.
Mechanism and treatment of olfactory dysfunction caused by coronavirus disease 2019
2023 · cited by 14
The review identifies persistent olfactory dysfunction as a major, long-term sequela seen after COVID-19.
Intranasal Insulin for the Treatment of Persistent Post-COVID-19 Olfactory Dysfunction.
2023 · cited by 9
This interventional study treats patients suffering from recalcitrant olfactory dysfunction lasting for more than 60 days post-infection.
Three-year assessment of cognitive and olfactory disturbances among COVID-19 convalescent patients grouped by olfactory hallucination status in Armenia: A qualitative and quantitative study.
2025 · cited by 1
The study examines long-term post-COVID olfactory disturbances extending up to three years post-infection.
Persistent Post-COVID-19 Olfactory Dysfunction and Its Association with Autonomic Nervous System Function: A Case-Control Study.
2024 · cited by 1
This case-control study reports significantly higher rates of ongoing smell dysfunction in post-COVID-19 patients compared to controls.