Communicable Diseases



A pathogen is a microorganism that enters the body and causes disease.

It causes communicable diseases- a disease that can spread easily from person to person. 

Pathogens can affect both plants and animals.


Very small cells.

1/100th the size of a body cell.

They reproduce rapidly inside our body. 

They make us feelill by producing anti toxins that damage our cells and tissues.


Not a cell

1/100th the size of…


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