This document summarizes nanobots, which are hypothetical self-propelled nanoscale machines that can perform tasks at the nanoscale. It discusses their potential design based on bacteria flagella, with components like sensors, motors, and power sources. Applications proposed include fighting cancer by targeting and destroying cancer cells, treating blood diseases by regulating white blood cell count, and performing gene therapy by replacing defective genes. While nanobots could revolutionize medicine, concerns exist around potential toxicity, replication getting out of control, and the challenges of accuracy and maintenance at the nanoscale. The document provides references and citations for further information.