STOCKHOLM: Katalin Kariko and Drew Weissman have been jointly awarded the Nobel Prize in Medicine for their discoveries that enabled the development of effective mRNA vaccines against Covid-19. “The 2023 #NobelPrize in Physiology or Medicine has been awarded to Katalin Karikó and Drew Weissman for their discoveries concerning nucleoside base modifications that enabled the development of effective mRNA vaccines against COVID-19,” The Nobel Prize posted on X on Monday. “The findings by 2023 #NobelPrize laureates Katalin Karikó and Drew Weissman led to approval of two successful mRNA-based Covid vaccines,” the post added.