A detailed scientific diagram illustrating how a vaccine triggers immunity, showing an arm receiving a vaccine, a lymphatic vessel, a lymph node with B and T cells, and the production of antibodies and memory cells.

What to Draw: “How a Vaccine Triggers Immunity” 1. On the left, draw an arm with a syringe labeled “Vaccine (antigen)”. 2. Draw an arrow from the arm to a small tube labeled “Lymphatic vessel”. 3. At the end of the tube, draw a bean-shaped lymph node. Inside it, draw and label: • a few B cells → write “make antibodies” • a few T cells → write “help activate B cells” 4. Draw arrows from the lymph node to the bloodstream, labeled: • “Antibodies spread through body” • “Memory cells give long-term protection” See more