In 2014 uncertainty around regulation for container closure and integrity testing (CCIT) fed a perceptible shift in mindset across the industry, causing some concern amongst many subject matter experts in biological manufacturers. Their concern was that gaps in guidance was enabling skewed expectations such that they would promote 100% CCIT for the release of drug product batches. This paper addresses this concern by re-stating the principles of CCI, qualification, process control and in-process testing to establish the framework within all effective container closure integrity programs. It concludes that performing 100% CCIT does not provide certainty that a process is well controlled and introduces an additional step that is not always necessary or suitable for the high processing speeds in the industry.

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