What is a Vaccine? - Definition, Function & Examples


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question 1 of 3

The purpose of vaccines is _____.

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1. Cells in your body that are responsible for fighting illness are _____

2. Antigens are _____.

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About This Quiz & Worksheet

Vaccines have significantly reduced life-threatening infections, contributing to increased average lifespan and removing infections as the number one cause of death in the developed world. You will be quizzed on the basics of vaccines and the immune system.

Quiz & Worksheet Goals

You'll need to be familiar with the following to do well on the assessments:

  • The purpose of vaccines and how they accomplish this
  • The cells that fight illness in the body
  • Why a flu vaccine is needed annually
  • The definition of antigens

Skills Practiced

  • Reading comprehension - ensure that you draw the most important information from the related lesson on vaccines
  • Defining key concepts - ensure that you can accurately define main terms, such as antigens and vaccine
  • Information recall - access your knowledge regarding why vaccines don't make you sick

Additional Learning

Check out the lesson entitled What is a Vaccine? - Definition, Function & Examples to examine the role of vaccines in our lives more closely. It tackles the following objectives:

  • Define vaccine
  • State the purpose of vaccines
  • Explain the basic function of the immune system
  • Understand how vaccines are made and how they work
  • Explain why some viruses only need one vaccine and others, like influenza, require repeated vaccination
  • Name the vaccinations that children are supposed to receive
  • Recognize some vaccines that adults might receive