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 -1.22%) basic handsets, to smartphones and tablets based on Apple (AAPL 0.34%) and Google (GOOGL 1.14%) operating systems. Cisco's (CSCO 0.38%) networking equipment and Equinix's (EQIX 0.56%) 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.