Identifying the greatest defect size, both for liquid leaks and microbial ingress, is a fundamental step toward protecting the integrity of single-use systems (SUS) under real process conditions. Integrity testing of such systems may become a prerequisite in the future because they are used in the most critical process steps, with detection limits correlating to liquid leaks and microbial ingress. Such testing guarantees the sterility of drug substances and drug products packaged in single-use systems and, therefore, enhance patient safety.…