Katalin Karikó is a Hungarian-born biochemist known for her pioneering work in mRNA technology. She played a crucial role in developing mRNA vaccines, which have been instrumental in combating the COVID-19 pandemic. Her research focused on modifying mRNA to enhance its stability and reduce immune reactions, making it a viable option for vaccines. Karikó's collaboration with Drew Weissman at the University of Pennsylvania led to significant advancements in the field. Their work laid the foundation for the successful development of mRNA vaccines, such as those produced by Pfizer-BioNTech and Moderna, which have saved countless lives worldwide.