evidence: mRNA isn’t the same as DNA, and it can’t combine with our DNA to change our genetic code. [...] Some viruses like HIV can integrate their genetic material into the DNA of their hosts, but this isn’t true of all viruses, and HIV can only do so with the help of specialised enzymes that it carries with it. MRNA vaccines don’t carry these enzymes, so there is no risk of the genetic material they contain altering our DNA. [...] So, although mRNA vaccines are a new technology, there is no reason to think that they will have a lasting effect on our biology – besides training our immune systems to prevent COVID-19 disease, that is.