No one woke up on a morning in December and decided that an mRNA vaccine was the way to go without any prior knowledge of the science and technology of mRNA vaccines. That knowledge goes back decades, and there have been many people working on this technology with many companies and governments spending large amounts of money on it. There have been clinical trials on mRNA vaccines not just for the coronavirus but for cancer and other ailments. Little by little, advances were made that brought us to the current vaccine.