<p>A country-specific protocol, AESI standardized case definitions using Brighton Collaboration criteria, data collection tools, and training materials were developed. Twenty-one Hospitals were assessed of which eight large Hospitals were selected, surveillance staff were trained on medical chart review, data collection, case definitions using the Brighton’s collaboration and OpenData Kit (ODK) reporting. National AEFI committee was oriented on the Hospital based sentinel Surveillance for predefined AESIs.</p>