Difference between health and disease.

Hint: According to WHO “Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity”. While the disease is the condition of abnormal dysfunction of the mental-physical states thus leading to illness.

Complete answer:
The health differs from disease by the absence of any discomfort in the body which may be because of external or internal factors. So, we can say that to enhance our understanding that “A disease is diagnosed by a doctor while illness is a specific instance of ill”. Always an illness has a cause followed by a negative consequence.
Different types of disease
The disease is classified into:
> communicable
> non-communicable
Communicable disease
Communicable diseases are infectious as well as contagious because of microorganisms such as bacteria, viruses, protozoa and fungi. For example, influenza, Chlamydia, Malaria
Non-communicable disease
Non-communicable diseases are illnesses which are not contagious. These are caused due to unhealthy lifestyles. Some lifestyle factors that affect physical and mental health include:
> Diet
> Alcohol
> Drug addiction
> Stress

Note: To clearly understand the concepts of health and illness, we need first to understand ‘health’ in the field of medicine. ‘health’ refers to illness or medical care. Health Care is concerned with care related to people who are ill. Differences between illness and disease are numerous. A disease is a specific illness that can be diagnosed only by a medical professional. Some illnesses cannot be diagnosed as diseases while some are diagnosed incorrectly or overdiagnosed or under-diagnosed. Many illnesses are not diseases, & vice versa is true. In medicine: illness is a single, measurable instance of ‘ill’. A simple illness is defined as the intersection of a single cause, or causal chain, and the resulting negative signs and symptoms:
> every illness has a cause
> every illness cause has negative signs and symptoms.