This document provides principles for assessing the comparability of biotechnological or biological products before and after changes are made in the manufacturing process for the drug substance or drug product. It aims to assist in the collection of relevant technical information which serves as evidence that the manufacturing process changes will not have an adverse impact on the quality, safety and efficacy of the drug product.

Keywords: Manufacturing, process changes, comparability, biotechnological products, biological products, recombinant proteins

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