Immunological memory

• What is the primary immune response?

  It is the relatively low production of a small number of correct antibodies the first time a pathogen is encountered.
• What characterizes the secondary immune response?

  It is the relatively fast production of large quantities of correct antibodies the second time a pathogen is encountered due to immunological memory.
• What is one difference between the primary and secondary immune response?

  The secondary response is faster in the production of antibodies than the primary response.
• Why is a higher concentration of antibodies in the secondary immune response beneficial?

  It prevents symptoms and reduces the likelihood of getting sick.
• How does the duration of the secondary immune response compare to the primary immune response?

  The secondary response is more prolonged and remains in the system for longer.
• Why is someone unlikely to suffer the symptoms of measles twice?

  Because the immune system retains memory cells that respond quickly to the virus upon re-exposure.