Diseases & disorders is a broad category which covers both deadly diseases and general health issues. There are hundreds of them which are potential threats to all living things.
There are two different types of disease, and they are broken down into infectious and non-infectious diseases.
Infectious disease is an illness caused by a microbe, and these microbes include bacteria, virus, fungi and protozoa. These four different types of germs affect the body in the following ways:
Bacteria – A single-celled organism that can reproduce
Virus – A microorganism that cannot reproduce itself - they take over the cells they infect in order to reproduce and spread
Fungi – They look like plants, but live off of animals, people and plants (examples are mushrooms and yeast)
Protozoa – Small parasites that live in the water and live off of other organisms, such as humans (examples include malaria and giardia)
There are also many non-infectious diseases, also known as non-communicable diseases (NCD). NCD’s aren’t caused by infectious agents, they instead refer to chronic diseases which last for long periods of time and develop slowly. They include heart diseases, strokes, cancers, chronic kidney disease, osteoarthritis, osteoporosis, Alzheimer’s disease and many more. This type of disease is the leading cause of death on a global scale, with 68% of all deaths in 2012 were caused by non-infectious, chronic diseases.
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