On 28 March 2026, WHO Member States agreed to extend negotiations on the Pathogen Access and Benefit Sharing (PABS) annex to the Pandemic Agreement. Negotiations were scheduled to resume from 27 April to 1 May, preceded by informal intersessional discussions, before consideration at the World Health Assembly in May. The unresolved issues include how benefits from pathogen use will be defined and distributed, the contractual structure of the system, and governance arrangements.[5]
PABS is intended to enable rapid sharing of pathogens with pandemic potential and associated benefits, including vaccines, diagnostics, and therapeutics, on an equal and equitable basis.[5] For the Lunar Ark, unresolved rules create uncertainty over access to pathogen data, genomic sequences, countermeasures, and international scientific cooperation during a biological emergency. A delayed framework increases the risk that terrestrial outbreaks, supply-chain disruption, or restrictions on biological materials could outpace the Ark’s ability to update its medical knowledge and biomanufacturing capabilities.
The Ark team should track the PABS negotiations through the April 27–May 1 session and subsequent WHA decisions; model scenarios involving delayed or restricted access to pathogen samples and sequence data; and design an internally reproducible biosurveillance and countermeasure programme. Priority work should include a legally independent pathogen-data archive, validated diagnostic and vaccine-design pipelines, and inventories of critical reagents, host-cell systems, antibiotics, antivirals, and diagnostic components sufficient for long-duration autonomy.