IL17A and COVID-19: Recent study has also confirmed that the application of Huopu Xialing Decoction in the treatment of COVID-19 patients in Wuhan of China showed obvious clinical efficacy, and 697 targets were screened from TCM Systems Pharmacology Database, and 43 targets of which were related to COVID-19 and mainly involved in the IL-17 and NF-κB signal pathways [61].