Vaccinations & Immunisation

• What does a vaccine contain?

  Small quantities of dead, weakened, or inactive forms of a pathogen
• Can vaccines be made against both bacterial and viral diseases?

  yes
• How do vaccines work? 

  They expose us to the antigens of a pathogen so that we can develop immunity to it
• What are the potential drawbacks of vaccines?

  They don't always give full immunity to the disease 

  They can (in rare cases) cause severe reactions such as seizures

  They can cause mild symptoms such as fever or a sore arm