mTikka is an electronic, cloud- based system for infant registration, vaccination recordkeeping, incentivization, and survey of vaccination beliefs. mTikka will focus on the poorest and hardest to reach segments of the population, helping to identify (in real-time) regions where vaccine coverage is limited, and to permit community-based, targeted interventions that will increase the reach of immunizations. Vaccine workers (VWs) will use the mTikka application loaded on low-cost smart phones to register an infant at birth.