GP2 breast cancer vaccine prevention principle is to stimulate cellular immunity and humoral immunity to produce antibodies against breast cancer cells. GP2 vaccine is mainly used to prevent HER2-positive breast cancer.The principle of GP2 breast cancer vaccine prevention is that HER2-positive breast cancer has a very high recurrence rate, and GP2, as a fragment of the human HER2 protein, is able to be captured by antigen-presenting cells, which are able to stimulate the antigen-presenting cells to locate T-cells that specifically bind to GP2. This T cell can proliferate into a specific effector T cell under stimulation, and this effector T cell can bind to the HER2 protein indicated by the tumor, thus killing the tumor cells. If you are suffering from breast cancer, you should actively treat it, have regular checkups on time to prevent the disease from recurring, and don’t stop the treatment so as not to jeopardize the patient’s life with the development of the disease.