上呼吸道慢性炎症：使咽部末梢循环发生病理变化，从而造成神经功能障碍而引起咽异感症状。

Chronic inflammation of upper respiratory tract: the pharyngeal pathological changes of peripheral circulation, resulting in neurological symptoms caused by pharyngeal paresthesia.

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结论：RSV感染导致气道副交感神经自身抑制性M2受体功能障碍，引起气道高反应性发生。

CONCLUSION: These results indicate that RSV infection can cause dysfunction of M2 autoreceptor on the airway preganglionic cholinergic nerves, resulting in airway hyperresponsiveness.

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结论：RSV感染导致气道副交感神经自身抑制性M2受体功能障碍，引起气道高反应性发生。

CONCLUSION: These results indicate that RSV infection can cause dysfunction of M2 autoreceptor on the airway preganglionic cholinergic nerves, resulting in airway hyperresponsiveness.

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