2022-02-242022-02-24https://lib.digitalsquare.io/handle/123456789/77749Several countries use DHIS2 data to produce secure digital certificates for COVID-19 vaccination or negative test results, through integration with external software applications and alignment with national, regional and global standards, including WHO guidelines. These documents provide a overview of the different facets of DHIS2 implementation.enDDCCDigital CertificateCOVID-19 CertificatesMetadataDHIS2Android implementationDatabase designMaintenance and use