Infectious Disease, also known as Transmissible Disease or communicable disease is Illness resulting from an infection. Infections are caused by infectious agents that are bacteria, nematodes, viruses, parasitic round warms, viroid’s, ticks, mites, fungi, helminths, ringworms.

A short-term infection is an Acute Infection. A long-term infection is a Chronic Infection.

The Public Health nursing is the branch of nursing concerned with the practice of promoting and protecting the health of the individuals. They will not directly provide care to individuals in the community; instead they support the provision of direct care through a process of evaluation and assessment of the need of the individuals. Public health nurses will plan, develop, and support systems which will prevent the occurrence of problems and provide access to care.

 Pharmacology is the branch of biology concerned with the study and the effects of the drugs on living organisms. Pharmacology is subdivided into two categories as, pharmacodynamics and pharmacokinetics, which provides a comprehensive picture of the safety and action of a medication.

Public Health Nutrition (PHN) focuses on the promotion of excellent health through nutrition and therefore the primary bar of nutrition connected un-healthiness within the population. The global peer-reviewed forum for the publication and dissemination of analysis geared toward understanding the causes of, and approaches and solutions to Nutrition-related public health achievements, things and issues round the world.

The diet of associate organism is what it eats, that is essentially determined by the provision and taste property of foods. For humans, a healthy diet includes preparation of Food and storage ways that preserve nutrients from reaction, heat or natural action, which scale back risk of food borne un-wellness.

Epidemiology is the study of the determinants and distribution of health and disease conditions in the specified population. The information obtained by the epidemiological studies is used to plan and evaluate strategies to prevent illness and manage patients in whom disease has already developed. It is a quantitative discipline working on the knowledge of statistics, probability and sound research methods.

The occurrence of diseases should be controlled and prevented through sanitary measures, proper nutrition, vaccinations and various other public health measures. The public should be protected from infectious diseases, food borne pathogens, environmental pollutants. Therefore, major steps should be taken to control and prevent the spreading of diseases worldwide.

Chronic disease is disease that occurs over a long period of time. It limits our activity and causes disabilities. Some diseases does not show any symptoms, in that case the person will be unaware of the disease and it might even lead to death of the individual. Some of the chronic diseases are Arthritis, cardiovascular diseases, stroke, Cancer, etc.

Health care promotion is the process of promotion where people are made to increase control over and improve their health. It focuses on the individual behaviour challenging social and environmental interventions.

Neurology is the branch of medicine concerned with the study of disorders of the nervous system. The nervous system is a complex, sophisticated system that coordinates its actions by transmitting signals to and from different parts of the body. The two major divisions are central nervous system and peripheral nervous system.

Mental Health is a cognitive, psychological and emotional wellbeing or the absence of a mental or behavioural disorder. It should be maintained at the satisfactory level of emotional and behavioural adjustment. It plays a vital role at every stage of life, from childhood to adulthood.

Obesity is the condition in which excess of body fats gets accumulated and it may have a negative effect on health. People are generally considered as obese when their BMI is between 25 to 30 kg/m².

Diabetes mellitus is a metabolic disorder in which there is a high concentration of sugar in the blood, which leads to several complications like diabetic neuropathy, diabetic retinopathy, diabetic nephropathy, etc. They are categorised into three groups, Type 1 diabetes, type 2 diabetes and gestational diabetes.

Cardiology is the branch of medicine dealing with the diseases and disorders of the heart and the parts of the circulatory system. The field includes the treatment of congenital Heart Diseases, coronary artery disease, and heart failure majorly. Physicians who specialize in the field of cardiology are called cardiologist.

Maternal health is closely connected to infant survival. While great steps have been made in reducing global child mortality, new-borns and now represent 44 percent of all child deaths. Every year, 2.9 million babies needlessly die within their first month and an extra 2.6 million are stillborn. The main cause, which are preventable and treatable, are confusions because of rashness, intricacies amid conveyance and contamination. National organizations recognize the need to accelerate the development, delivery and impact at scale of new approaches to deal with need worldwide medical issues.