The 2012 mHealth Summit near Washington, D.C., highlighted the vast opportunities in mobile technology and health care. The hardware runs the gamut from ubiquitous Nokia (NOK +1.19%) basic handsets, to smartphones and tablets based on Apple (AAPL +1.78%) and Google (GOOG +3.50%) operating systems. Cisco's (CSCO +0.74%) networking equipment and Equinix's (EQIX +0.25%) data centers also play a key role. In the video below, Dr. Patricia Mechael explains how all these companies have a huge international presence and help save many lives.