> There's no way for mRNA to scan the rest of your DNA sequence to make an if/else determination. mRNA is just gonna execute once its in the body. Of course th

> There's no way for mRNA to scan the rest of your DNA sequence to make an if/else determination. mRNA is just gonna execute once its in the body. Of course there is, genes can be turned on/off using transcription factors. Still, the sequence of vaccines are published and easy enough to sequence and analyze, so I don't think something like this could be mass produced.