Why mRNA Vaccines Were Insanely Difficult to Make (it took 50 years!) Channel: SciShow1.0M views • 25/04/2021Related VideosWhat is an mRNA vaccine and how does it work? – Dr. Mary RamsayHow Do mRNA Vaccines Work? | Vaccine Education Center at CHOPHow mRNA Vaccines Work (Covid-19 Pfizer and Moderna)mRNA Vaccines - Layman’s version (Pfizer/Moderna COVID-19 vaccines), plus some FAQs, Animation.