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Usage frequency of single herbal medicine in traditional Chinese medicine (TCM) part of the China National Guidelines of Diagnosis and Treatment for SARS-CoV, MERS-CoV, SARS-CoV-2, and influenza virus (The statistical data were based on the analysis of each traditional Chinese herbal medicine involved in different syndromes of viral pneumonia in China’s National Guidelines for TCM treatment of SARS-CoV, MERS-CoV, SARS-CoV-2, and influenza virus).
