<p>Since September 2022, five site monitoring visits to participating hospital conducted, staff trained, facilitated reporting to Uganda’s national AEFI ODK reporting. By August, 2023, 163 (M=79, F=84) potential AESI cases were identified and 11 AESIs validated by the causality committee. Data collection and prospective medical chart review for pre-defined AESI conditions at the 8 participating hospitals is ongoing.</p>