An approval process that previously took years was completed in months, due to the breakthrough in mRNA vaccines, which teach human cells how to make a protein that will trigger an immune response.
Moderna is alleging that Pfizer copied its mRNA technology it developed before the pandemic.
The lawsuit, which seeks undetermined monetary damages, was being filed in U.S. District Court in Massachusetts and the Regional Court of Dusseldorf in Germany, Moderna said in a press release on Friday.