The breakthroughs of mRNA vaccines for COVID-19 have demonstrated how fast science can work when there are no limits of funding or disease prevalence. In this episode, I discuss the science behind mRNA vaccines, the approval and regulatory process of these vaccines for COVID-19 infection prevention, and the ingredients of the vaccines. In this episode and the remaining episodes, I address the SARS-CoV-2 as 'COVID-19' which I use broadly when I talk about the virus and the respiratory illness that follows infection. Producer: Calvin Hillis