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[Hinews] SEOUL, South Korea — Cellid Co. (KOSDAQ: 299660), a South Korean biotechnology company, announced on July 29, 2025, that it has received a European patent for its proprietary adenovirus vector platform, used in its COVID-19 vaccine candidate AdCLD-CoV19-1 OMI.

The patent covers an optimized vector structure designed for large-scale production of replication-incompetent adenoviruses. This achievement follows similar patent approvals in South Korea, the United States, China, Japan, and Russia, with applications still under review in Vietnam, Indonesia, Thailand, and Brazil.

During the production of replication-incompetent adenoviral vectors, unintended generation of replication-competent adenoviruses can compromise product quality and safety. To address this issue, global pharmaceutical companies often develop specialized producer cell lines or use alternative adenovirus serotypes—methods that can be costly and increase reliance on foreign technologies.

Cellid’s patented technology reduces dependence on foreign platforms and supports the development of both its COVID-19 variant-targeted vaccine and BVAC immuno-oncology therapies.

Cellid’s corporate identity logo. (Image courtesy of Cellid)
Cellid’s corporate identity logo. (Image courtesy of Cellid)

“This European patent underscores the global recognition of our proprietary technology’s value,” said Chang-yul Kang, CEO of Cellid. “It enhances the quality and safety of our vaccines and strengthens South Korea’s domestic vaccine platform.”

Kang also emphasized the urgency of their work amid signs of a COVID-19 resurgence in Asia, including South Korea. “With Phase 3 clinical trial dosing completed, we are accelerating preparations for regulatory approval of our vaccine,” he said. “Through commercialization, we aim to bolster national vaccine sovereignty.”

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