RE:RE:InterestingYou fail to do any research. mRNA vaccines have been in research since the 80's. The only difference in the Covid vaccine is the spike protein that is created.
The messenger RNA vaccine instructs the body how to create a spike protein. This spike protein is found on the surface of the Covid 19 virus.
The body then breaks down the mRNA and removes it. The immune system creates antibodies to attach the spike protein, and it is this immune response and antibodies your body now has that attacks the actual virus should you become infected. This is why new vaccines can be created quickly. They are all similar, it is just the spiike protein that you want the body to create that is different. And the risk of catching the virus from the vaccine becomes non existent.