Mammoth Memory

Diseases and immunity

There are four main types of disease:

1.  Infectious diseases

2.  Deficiency diseases

3.  Genetic diseases (hereditary and non-hereditary)

4.  Physiological diseases

Infectious diseases

Infectious diseases are caused by pathogens – microorganisms that enter the body and then reproduce. 

They can easily be spread through direct or indirect contact.

Infectious diseases are caused by pathogens entering the body and reproducing to infect the blood they can be passed from person to person.

Infectious diseases are easily spread: imagine easily spreading a disease just like you spread butter on bread with knife.

Examples of infectious diseases

Typhoid, smallpox, cholera, diphtheria, influenza (flu), measles, common cold.

Measles is an infectious viral disease. But these diseases come and go because of our immune system

Measles is an example of a viral disease.

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