Vaccination

• If a pathogen enters the body, what tries to destroy the pathogen?

  the immune system
• What is used to make a vaccine?

  dead or inactive forms of a pathogen
• How can vaccines go into the body?

  They can be injected - called vaccination or immunisation
• Why are the dead or inactive pathogens injected into the body?

  To stimulate the white blood cells to produce antibodies, as if you were affected by a live pathogen
• How does vaccination make a person immune?

  It prevents subsequent infection because if the body meets this pathogen, it responds quickly producing more antibodies
• Specific antibodies usually recognise a particular antigen.
• What does the MMR vaccine prevent? (3)

  Measles, mumps and rubella
• Why are vaccines usually given to children at a young age?

  to protect them and the population
• What is herd immunity?

  When most people in a population are vaccinated to protect society from very serious diseases
• If a large proportion of the population is immune to a pathogen, how if the spread of the pathogen affected?

  It is reduced