Recently, a novel coronavirus pneumonia research by academician Zhong Nanshan has been controversial. Because it belongs to in vitro cell research, and no human clinical trials, then the Isatis tinctoria root sold out. However, it cannot be denied that Isatis tinctoria, as a plant extract, can improve human immunity and enhance the ability of virus prevention, which may inhibit the new coronavirus. Moreover, not only China attaches great importance to the role of plant extracts of traditional Chinese medicine, but also the European countries are preparing to use the components of plant extracts to prevent new coronavirus infection.

1. Prevention of coronavirus infection with plant extracts in Europe

The University of Bologna in Italy has jointly developed a food supplement containing plant extracts to support the role of the immune system in high-risk groups against coronavirus infection and prevent coronavirus infection. The food supplement is rich in wheat germ polyamine and spermidine, which plays a key role in promoting autophagy. The broad-spectrum antiviral essential oil is rich in eugenol, which can reduce the virus replication ability.

2. Effect of Isatis tinctoria on improving immunity and antiviral

Many previous studies have found that Isatis tinctoria has a significant broad-spectrum antiviral effect. "Institute of medicine, Chinese Academy of Medical Sciences: a class of indole compounds and their derivatives with antiviral activity in Isatis tinctoria " found that indoles and their derivatives play an important role.

At the same time, some studies have found that it can also improve immunity. According to the article " Isatis tinctoria active protein and its preparation and application" published by Nanjing University of traditional Chinese medicine, it is found that the active protein of Isatis tinctoria has obvious anti pancreatitis effect caused by various reasons; the inhibitory effect of Isatis tinctoria active protein on different tumors was studied by MTT method and tumor bearing mice, The research results show that the Isatis tinctoria active protein has significant anti-tumor activity and immunity enhancement effect.

Therefore, it is theoretically effective to use Isatis tinctoria to prevent coronavirus infection. Also, using natural plants to improve immunity and prevent coronavirus infection may be a good way.