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The pandemic of coronavirus disease 2019 (COVID-19) is an extreme threat to international health care, resulting in more than two million deaths. Data reveal that olfactory disorder is a characteristic symptom of COVID-19 and has unique clinical manifestations. The olfactory dysfunction induced by COVID-19 has sudden onset, short duration, and rapid recovery, with anosmia often the only symptom. Severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) affects the human body by binding to angiotensin converting enzyme 2 (ACE2) of the olfactory epithelium. However, the etiology of COVID-19-induced olfactory dysfunction is unclear. In many countries, vaccines for COVID-19 in human are beginning to be administered. Conventional conservative treatments are common for olfactory disorders caused by COVID-19. Rhinologists should be aware of olfactory dysfunction to avoid delayed diagnosis of COVID-19. The article reviews the latest scientific evidence of anosmia in COVID-19. [ABSTRACT FROM AUTHOR]

Rhinology is the study of nose, paranasal sinus, and nasopharynx. The nose is the most prominent structure on the human face and has been a subject of study since ancient human civilization. The history of rhinology has reflected the sociocultural aspects of the times, and rhinology has achieved remarkable growth with innovative discoveries by numerous pioneers. The focus of surgical procedures of the paranasal sinus shifted from mucosal stripping to functional endoscopic surgery with advancement of technology. Furthermore, the field of rhinology is gradually expanding due to cutting-edge technologies such as image-guided surgery, three-dimensional endoscopy, and robotic surgery. Additional clinical experiences and technological developments are expected to further advance rhinology. [ABSTRACT FROM AUTHOR]