Infectious disease - Simple English Wikipedia

# Infectious disease

### From Wikipedia, a free encyclopedia written in simple English for easy reading.

Infectious disease is illness caused by an organism being invaded by a pathogen. An organism is a living thing like a plant or animal. A pathogen is an organism that causes disease in other organisms. It can be passed from one organism to another. Passing this from one to another is called infection.

Some biological agents that cause infectious disease:

- Viruses like poliovirus and HIV
- Bacteria like staphlyococcus and E. Coli
- Parasites like malaria
- Fungi like ringworm

Infectious disease is an important cause of suffering and death. According to the World Health Organization about ¼ of all deaths are caused by infectious disease. The three pathogens that cause the most number of deaths are: HIV (the virus that causes AIDS), Tuberculosis, and Malaria.

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Categories: Medicine | Biology | Diseases

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