Figure 1.

Representation of the interactions between cells and/or cells and viruses. Representation of the interactions between cells and/or cells and viruses. HIV strains infect CD4+ T cells that become infected and produce new viruses. At the same time HIV peptides are presented via APC cells to T-Helper cells that become activated. Activated CD4+ T cells trigger B and CD8+ cells reactions: the first release antibodies that bind to the antigen while the latter directly remove infected CD4+ T cells. '+' and '-' signs indicate cell/virus production or removal.