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Lancet Respir Med ; 9(5): 533-544, 2021 05.
Article in English | MEDLINE | ID: covidwho-1537202

ABSTRACT

Cough is one of the most common presenting symptoms of COVID-19, along with fever and loss of taste and smell. Cough can persist for weeks or months after SARS-CoV-2 infection, often accompanied by chronic fatigue, cognitive impairment, dyspnoea, or pain-a collection of long-term effects referred to as the post-COVID syndrome or long COVID. We hypothesise that the pathways of neurotropism, neuroinflammation, and neuroimmunomodulation through the vagal sensory nerves, which are implicated in SARS-CoV-2 infection, lead to a cough hypersensitivity state. The post-COVID syndrome might also result from neuroinflammatory events in the brain. We highlight gaps in understanding of the mechanisms of acute and chronic COVID-19-associated cough and post-COVID syndrome, consider potential ways to reduce the effect of COVID-19 by controlling cough, and suggest future directions for research and clinical practice. Although neuromodulators such as gabapentin or opioids might be considered for acute and chronic COVID-19 cough, we discuss the possible mechanisms of COVID-19-associated cough and the promise of new anti-inflammatories or neuromodulators that might successfully target both the cough of COVID-19 and the post-COVID syndrome.


Subject(s)
COVID-19/complications , COVID-19/physiopathology , Cough/etiology , Inflammation/etiology , Nervous System Diseases/etiology , Neuroimmunomodulation , Cough/physiopathology , Humans , Inflammation/physiopathology , Nervous System Diseases/physiopathology , SARS-CoV-2 , Syndrome
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