Long-COVID severe refractory cough: discussion of a case with 6-week longitudinal cough characterization

Long coronavirus disease (COVID) refers to an array of variable and fluctuating symptoms experienced after acute illness, with signs and symptoms that persist for 8-12 weeks and are not otherwise explicable. Cough is the most common symptom of acute COVID-19, but cough may persist in some individuals for weeks or months after recovery from acute phase. Long-COVID cough patients may get stigmatised because of the public fear of contagion and reinfection. However, clinical characteristics and longitudinal course of long-COVID cough have not been reported in detail, and evidence-based treatment is also lacking. In this paper, we describe a case of long-COVID severe refractory cough with features of laryngeal hypersensitivity and dysfunction. We characterized cough using patient-reported outcomes and engaged in continuous cough frequency monitoring. Through the case study, we discuss potential mechanisms, managements, and clinical implications of long-COVID refractory cough problems.