On the occasion of World Microbiome Day, a popular science event titled “Invisible Allies of Health” was held on June 27, 2026, at the Palace of Science. The event was organized within the project Your Micro-World, funded by the Center for the Promotion of Science. The event brought together researchers, medical doctors, students and interested visitors, with the aim of presenting the importance of microorganisms that live in and around us to the public in an accessible and engaging way. It once again highlighted that the microbiome, although invisible to the naked eye, represents an important part of our everyday life and health.