Reduced SARS-CoV-2 infection risk is associated with the use of Seven-Flavor Herb Tea: A multi-center observational study in Shanghai, China

Shun-xian Zhang, Xiao-xu Chen, Yong Zheng, Bing-hua Cai, Wei Shi, Ming Ru, Hui Li, Dan-dan Zhang, Yu Tian, Yue-lai Chen

Journal of Integrative Medicine . 2023, (4): 369 -376 . DOI: 10.1016/j.joim.2023.06.005