What does disease look like?

Hint: Any disturbance in the structure or function of any organ or part of the body. It may be caused due to the attack of pathogens (virus, bacteria), lack of nutritious diet/balanced diet and lack of public health services.

Complete answer: There are two types of diseases:-
Infectious disease :- The diseases that can be spread from one person to another are called infectious diseases . For example cold.
Non-infectious diseases:- The diseases that can not be spread from one person to another are called non-infectious diseases . For example cancer.

On the basis of time period.
Acute disease:- these diseases last for a short period of time. The person recovers completely . For example cold.
Chronic disease:- the disease that lasts for lifetime . The person never recovers completely. For example diabetes.

On the basis of vector spreading disease :-

Bacterial diseases:-
Bacterial diseases include any type of illness caused by bacteria. For example :- cholera.
Viral diseases:-

Diseases caused by viruses. For example :- common cold.
Protozoan diseases:-

For example:- malaria caused by female anopheles mosquitoes.

Note: Disease can be viewed by examining symptoms of disease. The common symptoms of diseases include headache, fever, vomiting etc.
Like jaundice can be examined by pale skin. Diarrhoea can be examined by loose motions.
 Type of Disease Example
Airborne Diseases Common cold, influenza, measles, tuberculosis.
Water borne diseases Cholera, typhoid, hepatitis.
Sexual Diseases AIDS, Syphilis.
Animal borne Disease. Rabbis