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Questions and Answers
What is the definition of health, and how does it differ from the absence of disease or infirmity?
What is the definition of health, and how does it differ from the absence of disease or infirmity?
A state of complete physical, mental, and social well-being. It is not just the absence of disease or infirmity.
What is the difference between infectious and non-infectious diseases?
What is the difference between infectious and non-infectious diseases?
Infectious diseases are caused by pathogens (bacteria, viruses, fungi, parasites), while non-infectious diseases are not caused by pathogens.
What is the difference between chronic and acute diseases?
What is the difference between chronic and acute diseases?
Chronic diseases are long-term or persistent diseases, while acute diseases are short-term or self-limiting diseases.
What are the four main causes of disease?
What are the four main causes of disease?
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What is the difference between primary, secondary, and tertiary prevention?
What is the difference between primary, secondary, and tertiary prevention?
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What is epidemiology, and what are its key concepts?
What is epidemiology, and what are its key concepts?
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What is the immune system, and what are its two main components?
What is the immune system, and what are its two main components?
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What is the difference between incidence and prevalence in epidemiology?
What is the difference between incidence and prevalence in epidemiology?
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What is the role of the immune system in defending against disease?
What is the role of the immune system in defending against disease?
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What are the three levels of prevention, and how do they relate to disease prevention and control?
What are the three levels of prevention, and how do they relate to disease prevention and control?
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Study Notes
Health and Disease
Definition of Health
- A state of complete physical, mental, and social well-being
- Not just the absence of disease or infirmity
Types of Diseases
-
Infectious diseases: caused by pathogens (bacteria, viruses, fungi, parasites)
- Examples: tuberculosis, influenza, malaria
-
Non-infectious diseases: not caused by pathogens
- Examples: diabetes, heart disease, cancer
-
Chronic diseases: long-term or persistent diseases
- Examples: asthma, hypertension, arthritis
-
Acute diseases: short-term or self-limiting diseases
- Examples: common cold, flu, appendicitis
Causes of Disease
- Genetic factors: inherited traits or mutations
- Environmental factors: exposure to toxins, radiation, or other external agents
- Lifestyle factors: diet, physical activity, stress, and other personal choices
- Infectious agents: bacteria, viruses, fungi, parasites
Disease Prevention and Control
-
Primary prevention: preventing disease from occurring in the first place
- Examples: vaccination, sanitation, healthy diet
-
Secondary prevention: early detection and treatment of disease
- Examples: screening tests, medical check-ups
-
Tertiary prevention: managing and rehabilitating individuals with disease
- Examples: medication, physical therapy, counseling
Epidemiology
- Study of the distribution and determinants of disease in populations
- Incidence: number of new cases of disease in a population over time
- Prevalence: total number of cases of disease in a population at a given time
- Mortality rate: number of deaths in a population over time
Human Body's Defense against Disease
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Immune system: a complex system of cells, tissues, and organs that defend against infection
- Innate immunity: non-specific defense mechanisms (e.g. skin, mucous membranes)
- Adaptive immunity: specific defense mechanisms (e.g. antibodies, immune cells)
- Barriers: physical and chemical barriers that prevent infection (e.g. skin, stomach acid)
Health and Disease
Definition of Health
- Health is a state of complete physical, mental, and social well-being
- It's not just the absence of disease or infirmity
Types of Diseases
- Infectious diseases are caused by pathogens (bacteria, viruses, fungi, parasites)
- Examples of infectious diseases: tuberculosis, influenza, malaria
- Non-infectious diseases are not caused by pathogens
- Examples of non-infectious diseases: diabetes, heart disease, cancer
- Chronic diseases are long-term or persistent diseases
- Examples of chronic diseases: asthma, hypertension, arthritis
- Acute diseases are short-term or self-limiting diseases
- Examples of acute diseases: common cold, flu, appendicitis
Causes of Disease
- Genetic factors can cause disease due to inherited traits or mutations
- Environmental factors can cause disease due to exposure to toxins, radiation, or other external agents
- Lifestyle factors can cause disease due to diet, physical activity, stress, and other personal choices
- Infectious agents can cause disease due to bacteria, viruses, fungi, or parasites
Disease Prevention and Control
- Primary prevention aims to prevent disease from occurring in the first place
- Examples of primary prevention: vaccination, sanitation, healthy diet
- Secondary prevention aims to detect disease early and provide treatment
- Examples of secondary prevention: screening tests, medical check-ups
- Tertiary prevention aims to manage and rehabilitate individuals with disease
- Examples of tertiary prevention: medication, physical therapy, counseling
Epidemiology
- Epidemiology is the study of the distribution and determinants of disease in populations
- Incidence refers to the number of new cases of disease in a population over time
- Prevalence refers to the total number of cases of disease in a population at a given time
- Mortality rate refers to the number of deaths in a population over time
Human Body's Defense against Disease
- The immune system is a complex system of cells, tissues, and organs that defend against infection
- Innate immunity refers to non-specific defense mechanisms (e.g. skin, mucous membranes)
- Adaptive immunity refers to specific defense mechanisms (e.g. antibodies, immune cells)
- Barriers refer to physical and chemical barriers that prevent infection (e.g. skin, stomach acid)
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Description
Learn about the definition of health and the different types of diseases, including infectious and non-infectious diseases, as well as chronic diseases.
