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Table 4 Classification of disease severity

From: Efficacy and safety of Ban-Lan-Gen granules in the treatment of seasonal influenza: study protocol for a randomized controlled trial

Classification Features
1. Mild Can continue to participate in the clinical trial, without obstacles in the activities of daily living
2. Moderate Has certain obstacles to daily life, but not to the point of completely diminished function
3. Severe The extent of obstacles in the activities of daily living has led to the risk of permanent disability, and appropriate measures are needed to mitigate medical issues