Researchers Developed New Mpox mRNA Vaccine
A new trivalent vaccine candidate has shown promise in protecting immunocompromised subjects from the mpox virus.
Updated on Sept. 19, 2026 in Diseases — General
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Scientists have developed a trivalent mRNA vaccine candidate named AMA-IL-15 designed to protect against mpox. The vaccine has demonstrated the ability to provide complete survival in immunocompromised mice during experimental testing.
Why it matters
The re-emergence of the mpox virus globally poses a significant threat to immunocompromised individuals. This new approach aims to provide a more effective, next-generation vaccination strategy for these high-risk populations.
The AMA-IL-15 vaccine is a trivalent mRNA-LNP construct co-expressing the A35R, M1R, and A29L antigens. The candidate successfully improved pulmonary viral clearance and reduced early weight loss in animal models.
The details
The research team developed several candidates, including a cocktail mixture and a fusion construct, before finalizing the IL-15-armed version. This vaccine works by stimulating both neutralizing antibody responses and antigen-specific T-cell activity while increasing germinal center B-cell presence.
Timeline
The research study was published on September 19, 2026.
The Big Picture
This study follows the rapid advancement of mRNA vaccine development platforms, extending the technology used for COVID-19 to address emerging threats like the mpox virus.
This development suggests a future pathway for better protection for immunocompromised patients who are most vulnerable to severe mpox infections. While not yet available, the advancement indicates potential shifts in how high-risk groups may be managed medically in the future.
The takeaway
The successful use of IL-15 in an mRNA construct highlights the potential of using immune-stimulating adjuvants to bolster vaccine efficacy. This discovery could pave the way for more robust immunization strategies against various infectious diseases.
Further reading
For more information on the latest developments in viral research, visit the Diseases — General section.
More information
Read the complete peer-reviewed research study for full details on the trial results.
Source note: This article includes information reported by Nature.
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