Fig. 2From: The important herbal pair for the treatment of COVID-19 and its possible mechanismsDistribution rules of herbs from the 24 recommended Traditional Chinese medicine (TCM) prescriptions. a The top 20 most commonly used traditional herbs from the 24 recommended TCM prescriptions. b 16 rules for only two herbs. The larger the circle between the two herbs, the higher the confidence level, the darker the color, and the higher the lift valueBack to article page