A collection of microorganisms such as bacteria, viruses, and fungi that live in a particular environment, including the human body or parts of the body. The human microbiome plays an important role in health and disease.
For example, the human gut microbiome is uniquely shaped by an individual’s diet, lifestyle, genetics, and environment. Research has shown that the gut microbiome can have an impact on several health conditions, including cancer, and that certain cancer treatments can change the microbiome and impact cancer progression.