Any physical or functional change that occurs under normal conditions that causes discomfort or impossibility or impairs the health of a living organism is called a disease. Alternatively, poor functioning of the body or some parts of the body, which have certain symptoms.
The position of certain parts of the body that interfere with or disrupt their functions, according to the Oxford English Dictionary. Diseases are mainly classified into two types which should be as follows
In humans, it is caused by bacteria such as Streptococcus pneumonia and Haemophilus influenza. Streptococcus pneumonia is commonly called pneumococcus. Pneumonia is a serious disease of the respiratory tract. Fluid accumulates in the airways and trachea. As a result, the lungs do not get enough oxygen to survive.
Infectious diseases spread easily from one person to another. Infectious diseases are caused by deadly pathogens such as viruses, bacteria, fungi, parasites and worm aids.