I got the J&J which at least isn’t an RNA vaxx. I have no idea if I ever had Covid... I have a lot of allergies so near always feel like I have a head cold... haven’t had any fevers...
The J&J is an mRNA vax like Pfizer and Moderna. It just adds a stop to get there. Rather than introduce mRNA directly into the cell, the J&J introduces virus-encoded DNA into the cell via an adenovirus. The cell then produces mRNA from the DNA. And then from the mRNA it produces the spike protein. The result is the same — the cell gets spoofed into producing spike protein by mRNA. There’s a belief that J&J is a “traditional” vaccine but it’s not.
The closest you can get to a traditional vaccine is Novavax. Unlike the others, it doesn’t use an mRNA pathway to induce your body to create the virus protein. Instead it directly injects the virus protein into the body like a traditional vaccine.
I got the J&J and when I got the covid (5/22) I thought it was seasonal allergies until my wife got a slightly worse case the same time. Four days and done for each of us.