DNA --> RNA --> protein. This is the central dogma of molecular biology, where deoxyribonucleic acid (DNA) functions as the master copy (e.g. biological template) and ribonucleic acid (RNA) is the working copy. Messenger RNA (mRNA) provides the biological blueprint for protein development. Put another way, this biological code, composed of 4 nucleotides, is an instruction set received by ribosomes, protein factories in the cell, to build protein products. We discuss the recent buzz around mRNA therapeutics, with a focus on mRNA technologies being used in vaccine development. Pzifer and Moderna both received emergency use authorization from the FDA for their respective mRNA vaccines against SARS-COV-2. In a world where the average vaccine development time is 10-15 years, 1 year to approval is lightning speed. mRNA vaccine development is versatile, quick and now benefits from improved stability (the previous Achilles heel) thanks to key scientific contributions from Dr. Katalin Kariko and Dr. Drew Weissmann at the University of Pennsylvania. Importantly, mRNA vaccines have utility beyond infectious disease, where immense interest in cancer vaccine development has grown. Throw on that lab coat, purify some RNA polymerase and get ready for an experiment. Instead of ready, set, go mRNA only cares about A, U, C and G.