Traditional Chinese hospitals reported a much smaller incidence of staff health workers coming down with the SARS flu. This was due to health workers taking herbal formulas to boost their immune system and combat the virus. Equally, patients treated with Chinese herbal formulas were achieving a much higher success rate compared to the western medical approach of using the antiviral ribavirin combined with steroids.  In treating the sick, the Chinese approach followed principles of disease differentiation for each patient, rather than concocting standard herbal treatments, in each case addressing various presentations of lung fire, lung phlegm, yangming fever, etc. What was significant for the treatments of the SARS flu, however, was the inclusion of larger doses of specific herbs having clear anti-viral properties, including Ban Lan Gen (Radix Isatis), Ku Shen (Radix Sophora flavescens), Guan Zhong (Rhizome Dryopteris), Ban Zhi Lian (Herba Scutellaria barbata), She Gan (Rhizoma Belamcanda ) and others.