Which immunotherapy type is trained to specifically remember cancer cells?

Active immunotherapy is designed to stimulate the immune system to recognize and attack specific cancer cells. This approach involves training the immune system, particularly T cells and other immune components, to remember and specifically target cancer cells. By doing so, it enhances the immune response against tumors, allowing the body to identify and eliminate cancer cells more effectively.

In contrast, passive immunotherapy involves the administration of antibodies or immune components that are manufactured outside the body, which provide immediate, but not long-lasting, protection. Nonspecific immunotherapy typically activates the immune system broadly rather than targeting specific antigens associated with cancer cells. Specific immunotherapy implies the targeting of particular antigens, but without the training element that characterizes active immunotherapy.

Thus, active immunotherapy is the correct answer because it reflects the process of training the immune system to specifically remember and attack cancer cells, leading to potentially durable immunological memory against the cancer.