Gulfstream Daily Brief

Regulatory intelligence and policy · Issue 045

FDA finalizes CGT potency and hepatitis B guidance, UK publishes trial diversity pilot findings

Today’s updates address lifecycle potency assurance for cellular and gene therapies, hepatitis B testing for blood collections, and inclusion and diversity planning in UK clinical research.

By Scott Morvay, Founder November 3, 2026 Official sources linked

FDA

FDA finalizes cellular and gene therapy potency guidance

FDA finalized recommendations for assuring CGT product potency across the lifecycle. The guidance describes progressive implementation during development, considerations for rapid clinical development, and requirements for licensed products, including lot release testing.

Read the official source

FDA

FDA updates hepatitis B testing recommendations for blood collections

FDA finalized recommendations for hepatitis B virus testing of Whole Blood and blood components, including Source Plasma. The guidance replaces or supersedes several earlier FDA documents and recommendations.

Read the official source

MHRA

UK publishes Inclusion and Diversity Plan pilot findings

The Health Research Authority published findings from its pilot involving researchers and sponsors developing and submitting Inclusion and Diversity Plans for clinical trials and clinical investigations.

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Why this matters

The two final FDA guidances give regulatory teams current recommendations for CGT potency strategies and hepatitis B testing, while replacing earlier drafts or recommendations. The UK pilot findings provide a new reference point for sponsors considering how inclusion and diversity planning is developed and submitted in clinical research.

Scott Morvay

Founder, Gulfstream Intelligence

This brief provides general regulatory news and educational information. It is not legal or regulatory advice.