How Can It Do That?

In order to create such a vast library of solutions for every possible disease that could exist, your immune system does something extraordinarily brute force yet elegant.

It has a small number of gene fragments , each granting the cell the ability to identify a specific type of protein that could show up on a bacterium/virus.

The immune system then mixes and matches these gene fragments randomly. Basically shuffling the deck over and over again.

Once that's done, it's then taken to the Thymus , where the cell created is tested to make sure it cannot harm any of your own cells.

Since your immune system creates an infinite amount of cells, it also creates cells that can kill your own cells. Your thymus is crucial for identifying identification.

Your thymus contains a sample of every possible cell in your body, and ...