Great news but I wonder why she's confused. Breast cancer has both genetic and environmental causes. One unrecognized factor is bottled water. Plastics contain chemicals with estrogen-like effects and carcinogens. Some sit on store shelves FOR YEARS. Basically drinking plastic.
My older sister Pat developed breast cancer, first cancer victim in our family ever recorded. She's an RN and has always lived a healthy lifestyle, but she swallowed the propaganda and drank bottled water for almost 40 years, becoming a walking Superfund Site in the process.