The staging systems for acute, externally-contracted disease — the Six Channels, the Four Levels, and the San Jiao — that track a pathogen from surface to depth.
1. The Six Channels (Shang Han Lun)
Why acute disease needs staging systemsPreview12 min
The three Yang stages13 min
The three Yin stages12 min
2. The Warm Disease Systems
The Four Levels (wei-qi-ying-xue)13 min
The San Jiao pattern11 min
Comparing and using the systems11 min
3. Consolidation
Summary: the staging systems8 min
Check yourself8 min