The ImmsLink® interface is an EHR compatible portal used to report and receive immunization data from state immunization information systems (“IIS” or “registries”). Through ImmsLink®, providers are capable of real-time querying of state and municipal Department of Health immunization registries to access patient immunization histories as well as to report administered vaccines to the state registry. In addition to fulfilling reporting compliance, ImmsLink® capabilities significantly improve vaccine gap closures by providing clinicians with robust vaccination decision-making tools and forecasting algorithms based on the Advisory Committee on immunization Practices (ACIP) schedule.