Studies by Japanese scientists Yusoo Shin, Yutaka Tamai, Minoru Terazawa, as well as research results from Siberia, supervised by Professor Teplyakova, has proved that unique triterpene compounds, chromogen-polyphenol complexes the wild Chaga mushrooms contain help resist various viruses. Chaga mushroom extract demonstrated the ability to protect healthy cells from the Herpes virus as a result of the studies of antiviral activity on a Vero cell culture. Moreover, Chaga proved to be effective fighting against HIV-1, West Nile Virus (WNV), Influenza Virus of various subtypes, as well as Smallpox Viruses and Monkeypox Viruses. According to scientists, the antiviral effect of the medical Chaga is associated with a non-specific reaction with free virus particles. Compounds derived from Chaga can block healthy cells, thus protecting host cells from different viruses. Studies were carried out on a large number of mushrooms, however, only Chaga showed maximum antiviral activity.

An electron microscopy analysis of the microscopic structure of the Chaga mushroom allows us to conclude that the outer layers of the fungus, characterized by a high melanin content in comparison with the inner layers, can also be described by a denser structure, which complicates the extraction process, so the intensification of this process by various methods is urgent for researchers.