What antigen does not create immunologic memory?

Antigens that do not create immunologic memory are typically associated with non-specific immune responses, such as certain components of the innate immune system. For example, antigens from pathogens that do not elicit a robust adaptive immune response, like some polysaccharides from bacteria, may not lead to the formation of memory B or T cells. Additionally, antigens that are rapidly cleared or those that induce tolerance rather than an immune response may also fail to generate immunologic memory.