Our body is instructed to make our Immune system weaker at puberty....then, it is instructed to slowly poison our body at the age of 18....why? I know that as we live...we slowly damage ourself to death...but when we are kids, isn't our rate of recovery faster than the rate of damage? Then why does it slow down? I know how....it slows down b/c body only has a limited amount of untrained T-cells....but as body faces more and more diseases, it programs more and more T-cells....till it comes to a point where it cannot fight new diseases anymore..... This sounds pretty simple....why doesn't they just synthetically create t-cells(they already are taking dna out of one cell and implanting it into another) and insert it in our body? Thanks.