With mrna vaccines the cell copies the data but does the body see the infected cell as a threat and kill it as would occur in a normal immune response?

Confusing post: The 2 available vaccines against the RNA covid virus are made with synthetic protein material that mimics that of the spikes on the virus. Injection of this synthetic protein material triggers an immune response that will attack the spikes, rendering the rest of the viral RNA inconsequential. If you stop it at the spike level, it is not able to enter the cell & cause disease.

Covid vaccine: I'd say you have it right. As I ujderstand it, 2 mechanisms of our immune system are at work. One is killer antigen specific T cells and the other is a regular neutralizing antibody response.

Different way: mRNA vaccine (template for protein production), once injected into muscle cell, leads to produce Covid-19 spike protein (essential part of virus enabling viral particle to attach to human cell). This viral spike protein is then recognized as foreign protein by human immune system resulting in production of neutralizing antibody against Covid-19 spike protein blocking the viral attachment.