Immunisation

• What does a vaccine contain

  A dead/inactive form of the pathogen
• Why does the vaccine not make you feel unwell

  As the pathogen is dead + inactive
• What happens during an immunisation

  • A dead or inactive pathogen injected into body (called vaccine)
  • Dead pathogens still have antigens so lymphocytes produce complimentary antibodies
  • Memory lymphocytes are produced during immune response
  • Șo if you're infected with live pathogen -> memory lymphocytes can rapidly produce antibodies b4 u feel sick
• What are the advantages of immunising people against a disease

  • Prevents large outbreaks of disease (epidemic)
  • Prevents people who haven't been immunised from getting infected -> fewer people to pass it onto (herd immunity)
  • Some diseases have been wiped out completely
• What is the disadvantage of immunisation

  • Might have a bad reaction -> very rare
  • No guarantee being immunised will prevent you from getting the disease
  • Disease spreads very quickly
  • Ethical reasons -> not everyone gets immunised