Nothing beats Star Wars when you need to explain something totally unrelated to a geek. Case in point, This XKCD comic by Randall Munroe showing how the new Covid-19 mRNA vaccines (Pfizer or Moderna) work. Behold:
Seriously geeks, this might be the best explanation of how mRNA Vaccines work I have ever seen. Not only is it hilarious, it also does its job in a beautifully simple way! Send it to your favorite Star Wars nerd!