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 -0.44%) basic handsets, to smartphones and tablets based on Apple (AAPL -0.98%) and Google (GOOG +3.38%) operating systems. Cisco's (CSCO -0.57%) networking equipment and Equinix's (EQIX -0.15%) 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.