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epa09231828 Hungarian biochemist Katalin Kariko, Vice President of the Mainz, Germany, based BioNTech and adjunct professor of the University of Pennsylvania poses for portrait in Budapest, Hungary, 27 May 2021. Kariko, a researcher of messenger RNA or mRNA, has patented with her American colleague Drew Weissman the technology of mRNA based Covid-19 vaccines produced by the pharmaceuticals Pfizer-BioNTech and Moderna. EPA/Csilla Cseke HUNGARY OUT