CureVac sues Moderna in Delaware over mRNA patent infringement in Spikevax[1]

Published
Score
12

Why it matters

CureVac filed suit against Moderna on April 24, 2026, in U.S. District Court for the District of Delaware, alleging that Moderna's Spikevax COVID-19 vaccine infringes eight CureVac patents covering mRNA stabilization technology. The complaint claims Moderna copied CureVac's methods for stabilizing mRNA in vaccines and seeks royalties from Spikevax sales as damages.

The case pits a German biotech firm—CureVac, acquired by BioNTech in 2025—against U.S.-based Moderna. CureVac's own COVID vaccine achieved only 47% efficacy in Phase 3 trials and failed to reach market, while Moderna's Spikevax became a commercial success. The specific damages sought and Moderna's response remain undisclosed.

This filing is the latest escalation in a broader patent war among mRNA vaccine makers. BioNTech sued Moderna in 2026 over its mNEXSPIKE technology, while Moderna has previously sued Pfizer-BioNTech over vaccine patents. These disputes reflect unresolved intellectual property claims from pandemic-era vaccine development—a period when speed to market often outpaced formal licensing agreements. Practitioners should monitor whether this case becomes a bellwether for how courts value foundational mRNA patents and what royalty frameworks emerge for the technology.

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