Dobson, J., Whitley, R. J., Pocock, S., and Monto, A. S. (2015). Oseltamivir Treatment for Influenza in Adults: a Meta-Analysis of Randomised Controlled Trials. Lancet 385, 1729–1737. doi:10.1016/S0140-6736(14)62449-1
Ho, J. Y., Chang, H. W., Lin, C. F., Liu, C. J., Hsieh, C. F., and Horng, J. T. (2014). Characterization of the Anti-influenza Activity of the Chinese Herbal Plant Paeonia Lactiflora. Viruses 6, 1861–1875. doi:10.3390/v6041861
Hou, S., Xu, X., Wang, Y., and Yang, Y. (2020). Ephedrannin B Exerts Anti-viral and Anti-inflammatory Properties in BEAS-2B Cells Infected with Respiratory Syncytial Virus. J. Biosci. 45, 46. doi:10.1007/s12038-020-0016-y
Hsu, J. (2020). Covid-19: What Now for Remdesivir? BMJ 371, m4457. doi:10.1136/bmj.m4457
Hu, K., Guan, W. J., Bi, Y., Zhang, W., Li, L., Zhang, B., et al. (2021). Efficacy and Safety of Lianhuaqingwen Capsules, a Repurposed Chinese Herb, in Patients with Coronavirus Disease 2019: A Multicenter, Prospective, Randomized Controlled Trial. Phytomedicine 85, 153242. doi:10.1016/j.phymed.2020. 153242
Kubo, T., and Nishimura, H. (2007). Antipyretic Effect of Mao-To, a Japanese Herbal Medicine, for Treatment of Type A Influenza Infection in Children. Phytomedicine 14, 96–101. doi:10.1016/j.phymed.2006.09.015
Liu, Y. Arase, N. Kishikawa, J. Hirose, M. Lie, S. Tada, A., et al. (2021). The SARS-CoV-2 Delta Variant Is Poised to Acquire Complete Resistance to Wild-type Spike Vaccines. bioRxiv [Preprint]. Available at: https://www. biorxiv.org/content/10.1101/2021.08.22.457114v1 (Accessed September 8, 2021).
Ma, J., Huo, X. Q., Chen, X., Zhu, W. X., Yao, M. C., Qiao, Y. J., et al. (2020). Study on Screening Potential Traditional Chinese Medicines against 2019-nCoV Based on Mpro and PLP. Zhongguo Zhong Yao Za Zhi 45, 1219–1224. (in Chinese). doi:10.19540/j.cnki.cjcmm.20200216.401
Mantani, N., Andoh, T., Kawamata, H., Terasawa, K., and Ochiai, H. (1999). Inhibitory Effect of Ephedrae Herba, an oriental Traditional Medicine, on the Growth of Influenza A/PR/8 Virus in MDCK Cells. Antivir. Res 44, 193–200. doi:10.1016/s0166-3542(99)00067-4
Matsuyama, S., Nao, N., Shirato, K., Kawase, M., Saito, S., Takayama, I., et al. (2020). Enhanced Isolation of SARS-CoV-2 by TMPRSS2-Expressing Cells. Proc. Natl. Acad. Sci. U S A. 117, 7001–7003. doi:10.1073/pnas.2002589117
Motoo, Y., Arai, I., and Tsutani, K. (2014). Use of Kampo Diagnosis in Randomized Controlled Trials of Kampo Products in Japan: a Systematic Review. PLoS One 9, e104422. doi:10.1371/journal.pone.0104422
Muthuri, S. G., Venkatesan, S., Myles, P. R., Leonardi-Bee, J., Al Khuwaitir, T. S., Al Mamun, A., et al. (2014). Effectiveness of Neuraminidase Inhibitors in Reducing Mortality in Patients Admitted to Hospital with Influenza A H1N1pdm09 Virus Infection: a Meta-Analysis of Individual Participant Data. Lancet Respir. Med. 2, 395–404. doi:10.1016/S2213-2600(14)70041-4
Nagai, T., Kataoka, E., Aoki, Y., Hokari, R., Kiyohara, H., and Yamada, H. (2014). Alleviative Effects of a Kampo (A Japanese Herbal) Medicine "Maoto (Ma-Huang-Tang)" on the Early Phase of Influenza Virus Infection and its Possible Mode of Action. Evid. Based Complement. Alternat Med. 2014, 187036. doi:10. 1155/2014/187036
Nomura, T., Fukushi, M., Oda, K., Higashiura, A., Irie, T., and Sakaguchi, T. (2019). Effects of Traditional Kampo Drugs and Their Constituent Crude Drugs on Influenza Virus Replication In Vitro: Suppression of Viral Protein Synthesis by Glycyrrhizae Radix. Evid. Based Complement. Alternat Med. 2019, 3230906. doi:10.1155/2019/3230906
Nomura, T., Nazmul, T., Yoshimoto, R., Higashiura, A., Oda, K., and Sakaguchi, T. (2021). Ethanol Susceptibility of SARS-CoV-2 and Other Enveloped Viruses. Biocontrol Sci. 26, 177–180. doi:10.4265/bio.26.177
Odaguchi, H., Hyuga, S., Sekine, M., Nakamori, S., Takemoto, H., Huang, X., et al. (2019). The Adverse Effects of Ephedra Herb and the Safety of Ephedrine Alkaloids-free Ephedra Herb Extract (EFE). Yakugaku zasshi 139, 1417–1425. (in Japanese). doi:10.1248/yakushi.19-00122
Shirayama, R., Shoji, M., Sriwilaijaroen, N., Hiramatsu, H., Suzuki, Y., and Kuzuhara, T. (2016). Inhibition of PA Endonuclease Activity of Influenza Virus RNA Polymerase by Kampo Medicines. Drug Discov. Ther. 10, 109–113. doi:10.5582/ddt.2016.01010
Song, J., Zhang, L., Xu, Y., Yang, D., Zhang, L., Yang, S., et al. (2021). The Comprehensive Study on the Therapeutic Effects of Baicalein for the Treatment of COVID-19 In Vivo and In Vitro. Biochem. Pharmacol. 183, 114302. doi:10. 1016/j.bcp.2020.114302
STORK (2020). Standards of Reporting Kampo Products, ver. 4.3. Department of Pharmacognosy, Phytochemistry and Narcotics (DPPN), National Institute of Health Sciences (NIHS) of Japan and National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN). Available at: http://mpdb. nibiohn.go.jp/stork/index.html.(Accessed September 1, 2021)
Su, H. X., Yao, S., Zhao, W. F., Li, M. J., Liu, J., Shang, W. J., et al. (2020). Anti-SARS-CoV-2 Activities In Vitro of Shuanghuanglian Preparations and Bioactive Ingredients. Acta Pharmacol. Sin 41 (9), 1167–1177. doi:10.1038/ s41401-020-0483-6
Takayama, S., Namiki, T., Odaguchi, H., Arita, R., Hisanaga, A., Mitani, K., et al. (2021). Prevention and Recovery of COVID-19 Patients with Kampo Medicine: Review of Case Reports and Ongoing Clinical Trials. Front. Pharmacol. 12, 656246. doi:10.3389/fphar.2021.656246
Tanaka, T., Obha, K., Lawaahara, K., and Sakai, E. (1995). Comparison of the Constituents of Ephedra Herbs from Various Countries on Ephedrine Type Alkaloids. Nat. Med 49, 418–424.
Tsumura & Co. (2016). About Kampo. Available at: https://www.tsumura.co.jp/ english/kampo/02.htm (Accessed September 1, 2021).
Ueda, K., Kawabata, R., Irie, T., Nakai, Y., Tohya, Y., and Sakaguchi, T. (2013). Inactivation of Pathogenic Viruses by Plant-Derived Tannins: strong Effects of Extracts from Persimmon (Diospyros Kaki) on a Broad Range of Viruses. PLoS One 8, e55343. doi:10.1371/journal.pone.0055343
van de Sand, L., Bormann, M., Alt, M., Schipper, L., Heilingloh, C. S., Steinmann, E., et al. (2021). Glycyrrhizin Effectively Inhibits SARS-CoV-2 Replication by Inhibiting the Viral Main Protease. Viruses 13, 609. doi:10.3390/v13040609