Your Tattoo is INSIDE Your Immune System. Literally

Immune describes the state of being protected from a specific disease, typically through vaccination or prior exposure. It can also figuratively refer to being unaffected by something negative, such as criticism, or being exempt from certain duties or legal consequences.

A colored fluid used for writing, drawing, printing, or duplicating.

A permanent design made on the skin by inserting pigment into the dermis layer; or the act of making such a design.

Inside refers to the inner part, interior, or the side of something that is situated within boundaries. It can function as a preposition, adverb, adjective, or noun to describe being contained or positioned within a space.