5 of the following...
Pathogen has antigens on its surface that are recognised as foreign by the immune system
T helper cells stimulate cytotoxic T cells, B cells and phagocytes (or lysosomes)
B cells produce antibodies complementary to the antigen
Antigen presenting cells present antigens from the pathogen on their surface.
T cytotoxic cells kill/destroy antigen presenting cells displaying the antigen-antibody complex.
Antigen-antibody complex leads to the destruction of the pathogen (not antigen)
Via agglutination and
Phagocytosis of pathogen from lysozymes.
Memory cells are produced for a future secondary immune response.
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That the pathogen was a virus and not a bacteria.