1. How does your immune system work?
Starter
2. How does vaccination protect you against disease?
Immunity
What are the three ways the white blood cells protect against disease?
3. What are antigens and antibodies?

1. How does your immune system work?
2. How does vaccination protect you against disease?
3. What are antigens and antibodies?
Immunity
Antigens
• Every cell has proteins on its surface known as antigens. The antigens on microorganisms that get into your body are different to those on your own cells.
• This means that your immune system recognises microorganisms as being foreign.

1. How does your immune system work?
2. How does vaccination protect you against disease?
3. What are antigens and antibodies?
Immunity
An invading
Pathogen
Antigens
One of Your
Body Cells

1. How does your immune system work?
2. How does vaccination protect you against disease?
Immunity
Antibodies
• White blood cells make antibodies which join onto antigens and help to destroy the pathogens.
3. What are antigens and antibodies?
It takes time for me to make the antibodies to destroy the pathogen.
Whilst I work hard, the pathogen is releasing toxins to make you ill.

1. How does your immune system work?
2. How does vaccination protect you against disease?
Immunity
Antibodies
• The white blood cells remember the right antibody to tackle a specific pathogen, so they can get made again very quickly if you become re-infected.
• This is how you become immune.
3. What are antigens and antibodies?
I have a great memory!

1. How does your immune system work?
Immunity
Task 1: Answer the following questions in full sentences
2. How does vaccination protect you against disease?
3. What are antigens and antibodies?
1. What is an antigen?
2. What is an antibody?
3. Why do you become ill the first time you encounter a pathogen?
4. Why do you not get ill the second time you encounter a pathogen?

1. How does your immune system work?
2. How does vaccination protect you against disease?
Immunity
What is vaccination?
• Also known as immunisation , the process involves injecting a patient with a vaccine , so that they gain immunity against a particular disease
3. What are antigens and antibodies?

1. How does your immune system work?
2. How does vaccination protect you against disease?
Immunity
What is a vaccine?
• A vaccine is usually a dead or weakened form of the disease causing micro-organism.
3. What are antigens and antibodies?

1. How does your immune system work?
Immunity
How does it work?
2. How does vaccination protect you against disease?
3. What are antigens and antibodies?

This is how vaccines protect you against dangerous infectious diseases

This is how vaccines protect you against dangerous infectious diseases

1. How does your immune system work?
Immunity
Task 2: Rewrite in the correct order, drawing a diagram for each one.
2. How does vaccination protect you against disease?
3. What are antigens and antibodies?
(a) White blood cells have a type of memory.
(b)Small amounts of dead or inactive pathogen are injected into the body.
(c) If you encounter a live version of the pathogen, your white blood cells rapidly make antibodies to destroy it.
(d) The antigens in the vaccine stimulate the white blood cell to make antibodies.
(e) You are therefore immune.

1. How does your immune system work?
Task 2: Answer
Immunity
2. How does vaccination protect you against disease?
3. What are antigens and antibodies?
(b)Small amounts of dead or inactive pathogen are injected into the body.
(d) The antigens in the vaccine stimulate the white blood cell to make antibodies.
(a) White blood cells have a type of memory.
(c) If you encounter a live version of the pathogen, your white blood cells rapidly make antibodies to destroy it.
(e) You are therefore immune.

1. How does your immune system work?
Plenary
Immunity
2. How does vaccination protect you against disease?
• Create a 3x3 bingo grid.
• Fill each square with one of these key words:
3. What are antigens and antibodies?
Antigen, Antibody, White Blood Cell,
Pathogen, Vaccine, Immunisation,
Toxin, Bacteria, Virus