What cell function indirectly to produce humoral immunity?

B cells are the primary cells involved in humoral immunity, and they indirectly produce this immunity through the secretion of antibodies. When B cells encounter an antigen, they can differentiate into plasma cells, which produce specific antibodies that bind to the antigen, neutralizing it or marking it for destruction. Additionally, helper T cells play a crucial role in activating B cells, enhancing their ability to produce antibodies and thus facilitating the humoral immune response.