Immune repertoire

The immune repertoire encompasses the different sub-types an organism's immune system makes of immunoglobulins or T-cell receptors. These help recognise pathogens in most vertebrates. The sub-types, all differing slightly from each other, can amount to tens of thousands, or millions in a given organism. Such a wide variety increases the odds of having a sub-type that recognises one of the many pathogens an organism may encounter. Too few sub-types and the pathogen can avoid the immune system, unchallenged, leading to disease.

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