In 2006, Katalin Karikó and Drew Weissman started a company called RNARx, which aimed to commercialize non-immunogenic, nucleoside-modified RNA. The researchers eventually licensed the technology to two biotechnology companies, Moderna and BioNTech. In 2013 Karikó took a position as senior vice president at BioNTech, overseeing the company’s work on mRNA.