Breast cancer is a type of cancer that develops in the breast cells.

Cancer is a broad term used to describe a group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body.

Cancer immunotherapy (immuno-oncotherapy) is the stimulation of the immune system to treat cancer, improving the immune system's natural ability to fight the disease.

Cell biology is a branch of biology that studies the structure, function, and behavior of cells.

Mayo Clinic is a non-profit academic medical center located in Rochester, Minnesota.

The National Cancer Institute (NCI) coordinates the United States National Cancer Program and is part of the National Institutes of Health (NIH), which is one of eleven agencies that are part of the U.

NCI-designated Cancer Centers are a group of 72 cancer research institutions in the United States supported by the National Cancer Institute.

The Wikipedia page on the United States provides a comprehensive overview of the country.