Many people keep wondering the way the body keep differentiating microbes from it's own tissues. That is the role of Human Leukocyte antigen, a topic that I discussed last week. Of course when the body fails to recognise it's own tissues, it may end up destrying them, a condition known as autoimmunity. Tommorow on "Mega mover empire", I will be discussing the goings and comings of the condition "Autoimmunity"