Vaccibody AS announced that it has entered into an exclusive license agreement with Adaptive Biotechnologies Corporation, to use a broad selection of virus-specific T cell epitopes identified by Adaptive for Vaccibody to design and develop novel SARS-CoV-2 vaccines. Vaccibody's development strategy for its second-generation SARS-CoV-2 vaccine is designed to respond to the emerging threats of evolving variants with reduced sensitivity to first generation vaccines that were developed using the 2020 prototype spike protein. The 2-armed strategy aims to develop two candidates for the broad population.

First, a vaccine candidate encoding the receptor binding domain (RBD) derived from the South African beta variant of concern. And second, a T cell based vaccine candidate, encoding multiple validated immunodominant, conserved Adaptive-identified T-cell epitopes spanning multiple antigens across the SARS-CoV-2 genome. Adaptive has mapped the T cell immune response using more than 6,500 samples from patients impacted by COVID-19.

Adaptive used its immune medicine platform, leveraging its proprietary antigen mapping and deep sequencing capabilities, to identify naturally processed and presented T-cell epitopes to SARS-CoV-2 antigens. Adaptive's T-cell epitopes will be used by Vaccibody in its modular vaccine technology platform to target specific SARS-CoV-2 antigens to antigen presenting cells. Vaccibody has demonstrated that the SARS-CoV-2 vaccine candidate that incorporates Adaptive's T-cell epitopes induces a rapid, strong and broad T-cell response after administration of a single dose in a humanized preclinical model.

Under the terms of the license agreement, Adaptive has provided certain selected T-cell epitopes for exclusive use in Vaccibody's next-generation SARS-CoV-2 vaccines. Vaccibody will be responsible for further development of the potential T-cell SARS-CoV-2 vaccine candidates. Financial terms of this agreement will not be disclosed.

The phase 1/2 trial is currently in the planning phase. The CTA (Clinical Trial Application) is expected to be submitted in Third Quarter 2021 and initiation is planned for Fourth Quarter 2021. The clinical trial will be conducted in Norway.