A post on Facebook has claimed that the Covid-19 vaccine is an RNA vaccine that will “actually change your DNA”.
Although some of the 50 or so candidate Covid-19 vaccines are based on RNA technologies, they do not change your DNA. We’ve written about this before here.
Conventional vaccines contain inactivated versions of whatever pathogen causes the disease, or proteins on its surface, to cause an immune response in the body which means it can fight the real infection later.
RNA vaccines instead contain what’s called messenger RNA (mRNA), which codes for a protein specific to the pathogen’s surface. The body uses this mRNA to build its own copies of these proteins which the immune system responds to by producing antibodies providing protection if the person catches the real disease later.
This introduction of mRNA into human cells does not change the DNA of the human cells and if these cells replicate, the mRNA would not be incorporated into the new cells’ genetic information.