"With 2·2 billion mobile phones in developing countries, mobile technology can be used to detect and respond to disease outbreaks and improve public health and health care," says Kelly Morris in The Lancet.

http://www.cellular-news.com/story/33520.php

http://www.unfoundation.org/global-issues/technology/

Since 2006, regional/provincial health officers in every country of sub-Saharan Africa continue to be trained in the use of EpiSurveyor mobile electronic data collection software. The officers are using EpiSurveyor for the collection of information regarding clinic supervision, as well as any other data need that arises: vaccination coverage, outbreak response, etc.

Countries already trained and using EpiSurveyor include Kenya, Zambia, Ghana, Uganda, Cameroon, Senegal, and Sierra Leone.

http://www.undispatch.com/archives/2007/09/how_pdas_are_sa.php