Lesson 17: Vaccines

Question 1

What do vaccines contain?

Answer 1

• Dead/ weakened form of a pathogen.

Question 2

What are the steps for vaccination?

Answer 2

1. ) The vaccine containing dead/ weakened pathogen is injected.
2. ) White blood cells recognise antigens on them are foreign.
3. ) White blood cells produce antibodies for specific antigens.
4. ) The pathogen particles are destroyed.
5. ) White blood cells produce memory cells to remember the antibodies for the certain pathogen.
6. ) If the body is infected for real, antibodies are produced faster and a lot more of them. The pathogen will be destroyed before symptons are felt. This is known as immunity.

Question 3

What are the advantges of vaccination?

Answer 3

• A safe/ cost effective way of preventing disease.
• Smallpox has been eradicated and polio could be next.
• If enough people are vaccinated, those who aren’t will be protected as there is no where for the pathogen to be spread. This is known as herd immunity.

Question 4

What is herd immunity?

Answer 4

• When enough people are vaccinated so those who aren’t are protected as there is nowhere for the pathogen to be spread. This is known as herd immunity.

Question 5

Who discovered the vaccines?

How did he discover it?

Answer 5

• Edward Jenner 1780’s.

- Saw milkamaids protected from smallpox because of cowpox and used cowpox scabs to treat smallpox symptons.

Question 6

What does the MMR vaccine protect you against?

Answer 6

The MMR vaccine protects you against.

• Measles.
• Mumps.
• Rubella.