What is a major function of lymphocytes in the immune system?

Lymphocytes play a crucial role in the immune system, particularly in providing immunity against infections, especially viral infections. There are different types of lymphocytes, including T cells and B cells, which have specific functions. T cells help in directly killing infected host cells and regulating immune responses, while B cells are responsible for producing antibodies that target and neutralize pathogens, including viruses.

In the context of viral infections, lymphocytes are essential for identifying and responding to virus-infected cells. They recognize viral antigens, mount a specific immune response, and create immunological memory, which helps in the rapid response to future infections by the same virus. This ability to adapt and respond to specific pathogens is what makes lymphocytes a key component of adaptive immunity.

The other choices do not accurately reflect the major functions of lymphocytes. While they can modulate aspects of the immune response, their primary role is centered around combating infections, particularly viral ones.