Herbal medicine and pattern identification for treating COVID-19: a rapid review of guidelines Abstract Background Coronavirus disease 2019 (COVID-19) is pandemic and has caused illness to many people worldwide. This review aimed to summarize and analyze the herbal formulae provided by the guidelines for their pattern identifications (PIs) and compositions of herbs to treat patients with COVID-19. Methods We searched 7 data sources for eligible traditional medicine guidelines up to March 6, 2020 and found a total of 28 t