Predict questions

• Explain how vaccination can prevent the body from getting infected? [6 marks]

  • inject a weakened / dead/ inactive form of the pathogen into the body
  • as the pathogen is inactive / dead, it cannot lead to the disease in the patient
  • white blood cells are stimulated to produce the complementary antibodies to the antigen
  • during the primary infection the complementary antibodies are increased slowly and peaks at around day 10 then slowly decreases
  • during the second exposure, the relevant antibodies are produced rapidly and correctly to prevent infection