Günther Fink of the Swiss Tropical and Public Health Institute in Switzerland will develop a mobile phone-based system to improve the registration of births and the timeliness of childhood vaccinations in Ghana. Particularly in Northern Ghana, many women give birth at home and are less likely to ensure their infants get vaccinated on time, which exposes them to severe infectious diseases such as polio. Even in these low-resource settings, mobile phones are common, and have been successfully used to encourage healthy behavior.