The purpose of this NOFO is to support a more efficient method for HIV surveillance jurisdictions to identify potential interstate duplicates. The recipient will develop and provide a secure, encrypted, on-going privacy data-sharing tool capable of identifying potential duplicates across jurisdictions, implement necessary data security, confidentiality and privacy protections according to CDC standards, obtain participation agreements with 59 state and local health department HIV surveillance programs that will allow on demand submission and matching of person-level HIV surveillance data, and report back to jurisdictions on matching levels in formats that are importable into local/state HIV data systems.