Other thing I don’t know is do all 3 modify mrna? My friend thinks J&J doesn’t alter genes in any way.
Only the Moderna and Phizer ‘vaccines” use mRNA technology. Moderna actually derives its name from M(ode)RNA and both are considered gene therapy because they wrap instructions inside a fat module, which then tell our own DNA to make the spike protein. The expectation is that the body will learn to recognize the spike protein when it encounters covid in the wild.
My problem with this is how will such an encounter tell our bodies to protect against it when we’ve already told our bodies to make the protein? Typically, our bodies don’t kill things our DNA tells us to make - that’s the definition of an auto-immune reaction. I have no training in this field so this amateur biologist must be missing something important.
J&J and Astra-Zeneca are vector vaccines, which means they use another medium (dead virus) to deliver the antigen. Astra-Zeneca is a European company, so we hear a bit less about it in North America. Interestingly (to me), the AZ shot was also banned for a time for the same reason as J&J - blood clots. But ALL the jab brands cause blood clots so the bannings, since lifted, seemed political to me and designed purely to favour the jabs that mess with our DNA.