Messenger RNA (mRNA) technology has become popular in the last few years due to its use in COVID-19 vaccines. This technology has been so groundbreaking that it recently won the 2023 Nobel Prize in medicine “for discoveries concerning nucleoside base modifications that enabled the development of effective mRNA vaccines against COVID-19.” This isn’t new technology, however— modified mRNAs have been studied for decades and show significant potential for therapeutic applications. Compared to unmodified mRNAs, modified mRNAs are more stable and have more favorable immunogenic effects.