You've probably heard the exciting news that the RNA vaccines for COVID-19 have been successful in clinical trials and are currently being shipped around the world! While exciting, new technologies can be intimidating and understandably, can raise a lot of questions and concerns. In this episode we review the history of traditional vaccines, explain the science behind RNA vaccines, and answer your questions about this novel vaccine. How vaccines work article: https://www.cell.com/cell/fulltext/S0092-8674(20)31237-X Variolation: https://en.wikipedia.org/wiki/Variolation#:~:text=Variolation%20was%20the%20method%20of,but%20protective%2C%20infection%20would%20result. Vaccine types: https://www.vaccines.gov/basics/types RNA vaccines: https://www.the-scientist.com/news-opinion/the-promise-of-mrna-vaccines-68202 Immune system information: https://www.merckmanuals.com/home/immune-disorders/biology-of-the-immune-system/overview-of-the-immune-system#:~:text=Human%20leukocyte%20antigens%20(HLA)%20are,to%20distinguish%20self%20from%20nonself.&text=An%20immune%20response%20is%20the,immune%20system%20to%20an%20antigen. Moderna vaccine trial info: https://www.statnews.com/2020/11/16/modernas-covid-19-vaccine-is-strongly-effective-early-look-at-data-show/ Modern and Pfizer vaccines: https://www.washingtonpost.com/health/2020/11/17/covid-vaccines-what-you-need-to-know/?arc404=true Vaccine efficacy: https://scroll.in/article/979627/a-statistician-explains-what-does-90-efficacy-for-a-covid-19-vaccine-mean   Follow us @steministaspod on Twitter and Instagram. You can email us at steministas@gmail.com