Communicable diseases

What are communicable diseases?

Also known as infectious diseases, communicable diseases are caused by pathogens. Pathogens can be passed on, which can cause the transmission of diseases. Communicable diseases can also be passed onto the same species, or can also be passed onto other species as well.

What are pathogens?

Pathogens are micro-organisms that cause a disease and can be damaging. There are 4 types of pathogens:

• Bacteria
• Viruses
• Fungi
• Protist

How do pathogens make us ill?

Firstly, diseases can't be caught. You have to come…