Lots of people do not understand the difference between DNA and RNA just as many do not realize that a virus is not considered a living thing since it can not replicate or grow unless it inserts its RNA into a living cell which then is controlled by that RNA instructions

This is a short video which helps describe what an RNA vaccine does to help prevent getting sick from a virus.

https://www.youtube.com/watch?v=WOvvyqJ-vwo