Before we move on, here is a really interesting fact: The genes that are responsible for the MHC molecules are the most diverse genes in the human gene pool, leading to a huge variety of MHC molecules between individuals. Of all the things that are different between humans, why are the MHC molecules so unique to every person? Well, different types of MHC are better or worse at presenting antigens from different enemies, like one type might be especially good at presenting a specific virus antigen while another type could be great at presenting a bacteria antigen. For humans as a species this
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