Infection and Response


Infection and response studies the causes, effects, treatments and prevention of diseases. We look at communicable diseases (ones you can catch!) in this topic as you will cover a range of non-communicable diseases (CHD, cancer, diabetes and genetic diseases) in other topics.

There are 7 diseases that you need to be able to be able to describe the causes an d effects of these are:

Bacterial diseases:

  • Salmonella
  • Gonorrhoea

Viral Diseases:

  • Human Immunodeficiency Virus (HIV)
  • Measles
  • Tobacco mosaic virus

Protist Disease:

  • Malaria

Fungal Disease:

  • Rose black spot


Defence Against Disease:

We take a look at how the body prevents diseases getting into our blood and then how the immune system fights them when they do. We learn that bacteria make us ill by releasing toxins and rapidly multiplying. We learn that viruses make us ill by getting inside of our cells and rapidly multiplying – damaging our cells in turn. As viruses hide inside of cells this means that antibiotics are unaffective against them.

We then finally learn about vaccines and the process of drug development and testing.

The Essentials

100% sheet cell disease and immune response

Communicable Diseases factfile

revision-activities disease and drugs


Deeper Understanding

  1. Can you describe and explain this graph?


2. Explain the process of drug development and testing – state what/ who the drug is tested on at each stage and what it is being tested for at each stage.

3.Complete the sheet below from memory – use the information above to check/ correct.

Communicable Diseases

Other Links


Review and Rate your Understanding

Have you learnt all the facts on the 100% sheet?

Have you completed the BBC Bitesize tutorial?

Have you been able to complete all the questions on the 100% sheet?

Let us know how you feel about this topic in the comments section below. Any questions you have, just ask.

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