Vaccination programs are considered to be cost-effective strategies to reduce child mortality and morbidity, but in many low-income countries, coverage for routine vaccines remains low. This is due to a range of possible factors including low parent knowledge about the benefits of vaccination, inadequate vaccine supply, and poor supply chain management. In Mozambique, researchers are examining the effectiveness of a mobile application-based solution that uses mobile technology to overcome these challenges and improve vaccination coverage.

Researchers randomized the suggested contribution in a fundraising appeal sent to patrons of the Bavaria State Opera (Germany). They found that the suggestions increased the average donation while decreasing the participation rate, resulting in no significant change in the average return per mailing.