Question

A vaccine puts into the body weakened/dead pathogenic material, which by itself is incapable of causing disease. How does this help to protect the body in the case of infection by a live pathogen? A) A vaccine causes the elimination of antibodies from blood thus protecting the body at the time of an infection. B) A vaccine injects weakened/dead pathogenic material which fights the live pathogen at the time of an infection. C) A vaccine causes the secretion of antigens which remain in blood and fight the pathogen at the time of an infection. D) A vaccine causes the secretion of antibodies which remain in blood and fight the pathogen at the time of an infection. Eliminate

Answer 1

D- by injecting a weakened or dead pathogens, immune response is triggered. Phagocytes engulf pathogens and display their antigens to trigger T cells which help activate B cells. B cells divide into plasma cells which produce the correct antibody to fight the disease and memory T and B cells are produced. If the body is infected again the antigen will be recognised and memory B and T cells will produce antibodies meaning the immune response is quicker and the person will not show symptoms

Answer 2

D- by injecting a weakened or dead pathogens, immune response is triggered. Phagocytes engulf pathogens and display their antigens to trigger T cells which help activate B cells. B cells divide into plasma cells which produce the correct antibody to fight the disease and memory T and B cells are produced. If the body is infected again the antigen will be recognised and memory B and T cells will produce antibodies meaning the immune response is quicker and the person will not show symptoms