The document discusses how mobile tools can help with disease surveillance in low-income countries. It notes that timely, complete, and high-quality surveillance is difficult to achieve simultaneously. Mobile phones provide opportunities for more complete surveillance, but also challenges like usability, technology types, training costs, and pilot projects that don't scale. The organization InSTEDD has used mobile tools like GeoChat to help health workers during disasters and develop other solutions that don't require digital literacy. Effective surveillance requires clear goals and a balanced portfolio approach using mobile tools as part of broader systems and addressing issues like integration, data quality, and incentives.