The document discusses the field of nanomedicine, which uses nanotechnology and medicine to develop novel therapies and improve existing treatments. It describes how atoms and molecules are manipulated at the nanoscale to interact with human cells. Examples of nanomedicine applications provided include quantum dots to detect and locate cancer cells, nanoparticles to deliver chemotherapy drugs directly to cancer cells, and nanotubes to identify DNA changes associated with cancer. The document outlines the advantages of nanomedicine in more precise targeting and delivery of drugs while reducing side effects, and the potential it holds to transform medicine.