A system for mass vaccination includes a plurality of portable electronic injectors, a mobile process manager and a database. Each portable electronic injector includes at least one needle to administer a measured amount of at least one vaccine to a body skin/tissue and an indicator system to provide an indication when either an injection error occurs or when a vaccination indication is required. The mobile process manager is in wireless communication with the plurality of injection devices and controls a mass vaccination. The process manager transmits task data to all injection devices in parallel via WI-FI, receives the vaccination indications from each injector in real time, also receives injection errors and vaccination process data, alerts a vaccination process overseer generally in real-time of the errors and transmits the injection data from each injector via cellular and/or internet transmission to the database.