The report has undergone multiple updates to keep pace with technological advancements and evolving regulations like . The most recent update, released in November 2025 , introduced several significant changes:

PDA TR 26 offers a systematic approach to selecting, qualifying, and validating filters for liquid sterilization applications. It is frequently cited by major regulatory bodies, including the , EMA , and WHO , as an authoritative resource for ensuring product sterility and patient safety. Key Focus Areas:

Evaluating the potential for the filter to release substances into the drug product. 2. Evolution of TR 26: The 2025 Revision