Base pathogenesis of respiratory tract viral infection is phlegm-heat obstruction in the lung, so cooling and dispersing therapy can drive away stagnated exogenous pathogen.
中医认为呼吸道病毒感染的主要病因为外感风热时邪，基本病机为痰热壅肺，清法和宣法可以给邪以出路，驱邪外出；
The inflammation of airway and obstruction of phlegm and stagnated blood, the explanations to the same disease in two different medical systems. aims at the same goal while taking different routes.
气道炎症与痰瘀阻肺为不同医学体系对同一病症的诠释，二者殊途同归。
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