It isn't a foreign at all. You would not exist without mRNA. mRNA being developed by the body's cells is what produces proteins. That fabrication process is a key function of many cells. This is very basic biology.
You have also almost certainly been infected with numerous viruses over your lifetime. They inject their own mRNA into your cells which commands the cells to produce more viruses. That is how viruses reproduce - they do not reproduce on their own. You get infected because your own body turns into a virus making factory. You don't escape this reality by not taking the vaccine.
You even do not grasp the schizophrenic aspect of this vaccine. There is nothing natural about it, about the double bind mentality behind it.
It is one thing to get a disease to fight another disease and other forms of vaccines or herd immunities, it is another one to directly order your body to fabricate something you will then hope it will destroy and get rid of, telling it to literally sht where you eat and then clean it up.
There was one thing called brainwash, this is “body/immunity wash”. Good luck conditioning yourself like Monsanto corn, it is not for me and many others, because I know it is not how you fight viruses, by motivating pointless metabolisms that can only invite more diseases to sprout up in your midst than help you fight them.
You do not learn how to ward off criminals from your house by turning yourself into one and see how you can fix it. This is the old devil cynical challenge for fools.
Another “natural mRNA” which conditions friendly metabolism, using your “body as a factory of vaccine”, is AIDS, by the way ...
So why don’t you inject yourself with that to check it out... Let me know how that works out for you