, TESTBANK FOR Nelson and Williams' Infectious Disease Epidemiology,
Fourth Edition Williams
Important Notes
The file includes the complete test bank, organized chapter by chapter.
A sample of selected pages has been provided for preview.
All available appendices and Excel files (if included in the original resources) are
provided.
Quizzes, Midterm and final exams are included (if available in the original resources).
We continuously update our files to ensure you receive the latest and most accurate
editions.
New editions are added regularly – stay connected for updates!
⚠️Note on Answer Keys: If the answer key is not included within the chapter
questions, you will find the complete answers and solutions at the end of each
chapter.
✅ Why Buy From Us?
📚 Complete & organized chapter-by-chapter – no missing content, no guessing.
⚡ Instant digital delivery – get your file the moment you pay, no waiting.
📅 Always up to date – we track new editions so you always get the latest version.
💬 Friendly support – real humans ready to help, anytime you need us.
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,Import Settings:
Base Settings: Brownstone Default
Information Field: Complexity
Information Field: Ahead
Information Field: Subject
Information Field: Title
Highest Answer Letter: D
Multiple Keywords in Same Paragraph: No
NAS ISBN13: 9781284143942, add to Ahead, Title tags
Chapter: Chapter 01 – Testbank
Multiple Choice
1. Who first proposed the theory that contagion could occur at a distance, without direct contact or
fomites?
A) Athanasius Kircher
B) Thomas Sydenham
C) Girolamo Fracastoro
D) Frank Snowden
Ans: C
Ahead: Contagion
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
2. According to Charles-Edward A. Winslow, why could germ theory have emerged earlier than it did?
A) The invention of antibiotics was already complete by 1700.
B) The three main scientists lacked the intelligence to collaborate.
C) There was enough theoretical and observational evidence by 1700 to support germ theory.
D) Most people already accepted germ theory by the 18th century.
Ans: C
Ahead: Pathogenic Microorganisms
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
3. What was the theory of disease involving toxic air called?
A) Miasma theory
B) Germ theory
C) Humoralism
D) Contagion theory
Ans: A
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
,4. What was Pasteur’s improvement over Spallanzani’s setup?
A) He added oxygen inhibitors.
B) He used fine gauze.
C) He sealed flasks tighter.
D) He used swan-necked flasks to allow air without contamination.
Ans: D
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
5. If a scientist in the 18th century believed in humoralism, what treatment might they suggest?
A) Antibiotics
B) Balancing body fluids
C) Eliminating bacteria
D) Filtering air
Ans: B
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
6. What barrier to germ theory did Theodor Schwann help overcome?
A) The belief that disease was caused by maggots
B) The idea that putrefaction and fermentation were purely chemical processes
C) The belief that disease was caused by humoral imbalance
D) The theory that diseases originated in political conditions
Ans: B
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
7. Which belief system delayed the recognition of microbes as disease agents the most?
A) Germ theory
B) Humoralism
C) Miasma
D) Abiogenesis
Ans: D
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
8. Why did Winslow believe physicians were cautious about accepting contagion theory?
A) Early theories couldn’t explain indirect transmission or carriers.
,B) It dismissed environmental factors entirely.
C) It lacked historical precedent.
D) It contradicted public opinion.
Ans: A
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
9. Which Italian scientist proved that the silkworm disease muscardine is caused by a fungus?
A) Agostino Bassi
B) Filippo Pacini
C) Jacob Henle
D) Robert Koch
Ans: A
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
10. Who published On the Mode and Communication of Cholera in 1855, linking cholera to water?
A) Louis Pasteur
B) John Snow
C) Max von Pettenkofer
D) Walter Reed
Ans: B
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
11. The sanitary movement led by Edwin Chadwick was based primarily on the __________ theory of
disease.
A) humoral
B) germ
C) zymotic
D) filth
Ans: D
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
12. If an investigator today followed all four Koch’s postulates for a novel bacterium, what would the final
(fourth) step be?
A) Grow the bacterium on selective agar.
B) Show antibodies form in infected hosts.
C) Re‑isolate the identical bacterium from the experimentally infected host.
D) Sequence the bacterium’s genome.
Ans: C
,Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
13. Why did Beijerinck describe viruses as a “living fluid”?
A) They grew only in solid media.
B) Their infectious nature persisted after filtration and they could not be cultured like bacteria.
C) They were visible as motile rods under a light microscope.
D) They dissolved bacterial cell walls.
Ans: B
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
14. Judge the following claim: “Early sanitary reforms were ineffective until germ theory was accepted.”
A) Accurate—mortality declined only after Koch’s work.
B) Accurate—vaccines were the sole cause of gains.
C) Inaccurate—filth reduction lowered disease burdens even before full germ‑theory adoption.
D) Impossible to evaluate from historical evidence.
Ans: C
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
15. HIV and the immune suppression it causes have allowed for a resurgence of what disease in much of
the world?
A) Polio
B) Malaria
C) Syphilis
D) Tuberculosis
Ans: D
Ahead: The Infectious Diseases Challenge
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
True/False
1. True or False? Carlo Francesco Cogrossi believed diseases were caused by an imbalance of bodily
humors.
Ans: False
Ahead: Pathogenic Microorganisms
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
2. True or False? Miasma theory claimed that diseases were caused by living microscopic organisms.
,Ans: False
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
3. True or False? Virchow believed that understanding disease required attention to social and political
contexts, not just biological ones.
Ans: True
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
4. True or False? Bassi’s muscardine research was the first to show a non‑arthropod microbe could
cause disease.
Ans: True
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
5. True or False? John Snow identified Vibrio cholerae while conducting his Broad Street pump
epidemiology.
Ans: False
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
,Import Settings:
Base Settings: Brownstone Default
Information Field: Complexity
Information Field: Ahead
Information Field: Subject
Information Field: Title
Highest Answer Letter: D
Multiple Keywords in Same Paragraph: No
NAS ISBN13: 9781284143942, add to Ahead, Title tags
Chapter: Chapter 02 – Testbank
Multiple Choice
1. What does the epidemiologic triangle illustrate?
A) The timeline of disease treatment
B) The interaction between host, agent, and environment in disease development
C) The hierarchy of disease severity
D) The classification of diseases into acute and chronic
Ans: B
Ahead: Introduction
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
2. A public health team is deciding where to allocate resources to reduce childhood mortality in urban
areas. Based on the Global Burden of Disease framework, which disease should they prioritize?
A) Cardiovascular disease
B) Alzheimer's disease
C) Lung cancer
D) Diarrheal disease
Ans: D
Ahead: Introduction
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
3. Why do epidemiologists classify infectious diseases by transmission and reservoir?
A) To study symptoms and pathology more accurately
B) To determine clinical interventions and surgical procedures
C) To analyze how diseases spread and identify points for public health intervention
D) To isolate bacteria for laboratory testing
Ans: C
Ahead: The Classification of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
,4. Why might a single infectious organism have multiple modes of transmission?
A) Because different laboratory methods may misclassify the organism
B) Because transmission depends on the epidemiologic context and exposure routes
C) Because clinical symptoms are always varied
D) Because only airborne pathogens show variability in transmission
Ans: B
Ahead: The Classification of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
5. Which of these diseases has low pathogenicity?
A) Polio
B) Measles
C) Rabies
D) Chickenpox
Ans: A
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
6. What is an example of a weakly immunogenic organism?
A) HBV
B) Rubella
C) Polio
D) Neisseria gonorrhoeae
Ans: D
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
7. Generally, the acute response to infection is characterized by a predominance of _____ antibodies, but
later an IgG predominance emerges.
A) IgA
B) IgE
C) IgD
D) IgM
Ans: D
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
8. Which virus has shown persistent cyclical transmission even after widespread vaccination, especially
due to waning immunity?
A) Measles
B) Rubella
C) Pertussis
D) Influenza
, Ans: C
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
9. Why might respiratory infections increase during the winter?
A) Lower indoor humidity and crowding
B) Increased vitamin D exposure
C) Seasonal mosquito transmission
D) Enhanced immune response
Ans: A
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
10. The term attack rate is commonly used to describe which of the following?
A) Chronic disease progression
B) Cumulative incidence in outbreak settings
C) Mortality due to infection
D) The rate of hospital admissions
Ans: B
Ahead: Epidemiologic Studies of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
11. Which of the following measures is most appropriate for use in a cohort study assessing new cases
over time?
A) Odds ratio
B) Prevalence ratio
C) Point prevalence
D) Risk ratio
Ans: D
Ahead: Population Comparisons and Epidemiologic Inference
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
12. Which study design describes data from a group of similar cases without a control group?
A) Case-control study
B) Case series
C) Ecologic study
D) Cross-sectional study
Ans: B
Ahead: Types of Epidemiologic Study Design
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
Fourth Edition Williams
Important Notes
The file includes the complete test bank, organized chapter by chapter.
A sample of selected pages has been provided for preview.
All available appendices and Excel files (if included in the original resources) are
provided.
Quizzes, Midterm and final exams are included (if available in the original resources).
We continuously update our files to ensure you receive the latest and most accurate
editions.
New editions are added regularly – stay connected for updates!
⚠️Note on Answer Keys: If the answer key is not included within the chapter
questions, you will find the complete answers and solutions at the end of each
chapter.
✅ Why Buy From Us?
📚 Complete & organized chapter-by-chapter – no missing content, no guessing.
⚡ Instant digital delivery – get your file the moment you pay, no waiting.
📅 Always up to date – we track new editions so you always get the latest version.
💬 Friendly support – real humans ready to help, anytime you need us.
🔒 Safe & secure – thousands of satisfied students trust us every semester.
🛡️Our Guarantees
💰 Money-Back Guarantee: Not satisfied? We offer a full refund – no questions asked.
🔄 Wrong File? No Problem: Contact us and we will replace it immediately with the
correct version, free of charge.
⏰ 24/7 Support: We are always here – reach out anytime and expect a fast response.
,Import Settings:
Base Settings: Brownstone Default
Information Field: Complexity
Information Field: Ahead
Information Field: Subject
Information Field: Title
Highest Answer Letter: D
Multiple Keywords in Same Paragraph: No
NAS ISBN13: 9781284143942, add to Ahead, Title tags
Chapter: Chapter 01 – Testbank
Multiple Choice
1. Who first proposed the theory that contagion could occur at a distance, without direct contact or
fomites?
A) Athanasius Kircher
B) Thomas Sydenham
C) Girolamo Fracastoro
D) Frank Snowden
Ans: C
Ahead: Contagion
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
2. According to Charles-Edward A. Winslow, why could germ theory have emerged earlier than it did?
A) The invention of antibiotics was already complete by 1700.
B) The three main scientists lacked the intelligence to collaborate.
C) There was enough theoretical and observational evidence by 1700 to support germ theory.
D) Most people already accepted germ theory by the 18th century.
Ans: C
Ahead: Pathogenic Microorganisms
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
3. What was the theory of disease involving toxic air called?
A) Miasma theory
B) Germ theory
C) Humoralism
D) Contagion theory
Ans: A
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
,4. What was Pasteur’s improvement over Spallanzani’s setup?
A) He added oxygen inhibitors.
B) He used fine gauze.
C) He sealed flasks tighter.
D) He used swan-necked flasks to allow air without contamination.
Ans: D
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
5. If a scientist in the 18th century believed in humoralism, what treatment might they suggest?
A) Antibiotics
B) Balancing body fluids
C) Eliminating bacteria
D) Filtering air
Ans: B
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
6. What barrier to germ theory did Theodor Schwann help overcome?
A) The belief that disease was caused by maggots
B) The idea that putrefaction and fermentation were purely chemical processes
C) The belief that disease was caused by humoral imbalance
D) The theory that diseases originated in political conditions
Ans: B
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
7. Which belief system delayed the recognition of microbes as disease agents the most?
A) Germ theory
B) Humoralism
C) Miasma
D) Abiogenesis
Ans: D
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
8. Why did Winslow believe physicians were cautious about accepting contagion theory?
A) Early theories couldn’t explain indirect transmission or carriers.
,B) It dismissed environmental factors entirely.
C) It lacked historical precedent.
D) It contradicted public opinion.
Ans: A
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
9. Which Italian scientist proved that the silkworm disease muscardine is caused by a fungus?
A) Agostino Bassi
B) Filippo Pacini
C) Jacob Henle
D) Robert Koch
Ans: A
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
10. Who published On the Mode and Communication of Cholera in 1855, linking cholera to water?
A) Louis Pasteur
B) John Snow
C) Max von Pettenkofer
D) Walter Reed
Ans: B
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
11. The sanitary movement led by Edwin Chadwick was based primarily on the __________ theory of
disease.
A) humoral
B) germ
C) zymotic
D) filth
Ans: D
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
12. If an investigator today followed all four Koch’s postulates for a novel bacterium, what would the final
(fourth) step be?
A) Grow the bacterium on selective agar.
B) Show antibodies form in infected hosts.
C) Re‑isolate the identical bacterium from the experimentally infected host.
D) Sequence the bacterium’s genome.
Ans: C
,Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
13. Why did Beijerinck describe viruses as a “living fluid”?
A) They grew only in solid media.
B) Their infectious nature persisted after filtration and they could not be cultured like bacteria.
C) They were visible as motile rods under a light microscope.
D) They dissolved bacterial cell walls.
Ans: B
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
14. Judge the following claim: “Early sanitary reforms were ineffective until germ theory was accepted.”
A) Accurate—mortality declined only after Koch’s work.
B) Accurate—vaccines were the sole cause of gains.
C) Inaccurate—filth reduction lowered disease burdens even before full germ‑theory adoption.
D) Impossible to evaluate from historical evidence.
Ans: C
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
15. HIV and the immune suppression it causes have allowed for a resurgence of what disease in much of
the world?
A) Polio
B) Malaria
C) Syphilis
D) Tuberculosis
Ans: D
Ahead: The Infectious Diseases Challenge
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
True/False
1. True or False? Carlo Francesco Cogrossi believed diseases were caused by an imbalance of bodily
humors.
Ans: False
Ahead: Pathogenic Microorganisms
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
2. True or False? Miasma theory claimed that diseases were caused by living microscopic organisms.
,Ans: False
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
3. True or False? Virchow believed that understanding disease required attention to social and political
contexts, not just biological ones.
Ans: True
Ahead: Why Did It Take So Long from the Observation of Microorganisms to Understanding Them as
Causes of Disease?
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
4. True or False? Bassi’s muscardine research was the first to show a non‑arthropod microbe could
cause disease.
Ans: True
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
5. True or False? John Snow identified Vibrio cholerae while conducting his Broad Street pump
epidemiology.
Ans: False
Ahead: Pathogenic Microorganisms: Contagium Animatum
Subject: Chapter 1
Title: A Brief History of the Origins of Infectious Disease Epidemiology
,Import Settings:
Base Settings: Brownstone Default
Information Field: Complexity
Information Field: Ahead
Information Field: Subject
Information Field: Title
Highest Answer Letter: D
Multiple Keywords in Same Paragraph: No
NAS ISBN13: 9781284143942, add to Ahead, Title tags
Chapter: Chapter 02 – Testbank
Multiple Choice
1. What does the epidemiologic triangle illustrate?
A) The timeline of disease treatment
B) The interaction between host, agent, and environment in disease development
C) The hierarchy of disease severity
D) The classification of diseases into acute and chronic
Ans: B
Ahead: Introduction
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
2. A public health team is deciding where to allocate resources to reduce childhood mortality in urban
areas. Based on the Global Burden of Disease framework, which disease should they prioritize?
A) Cardiovascular disease
B) Alzheimer's disease
C) Lung cancer
D) Diarrheal disease
Ans: D
Ahead: Introduction
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
3. Why do epidemiologists classify infectious diseases by transmission and reservoir?
A) To study symptoms and pathology more accurately
B) To determine clinical interventions and surgical procedures
C) To analyze how diseases spread and identify points for public health intervention
D) To isolate bacteria for laboratory testing
Ans: C
Ahead: The Classification of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
,4. Why might a single infectious organism have multiple modes of transmission?
A) Because different laboratory methods may misclassify the organism
B) Because transmission depends on the epidemiologic context and exposure routes
C) Because clinical symptoms are always varied
D) Because only airborne pathogens show variability in transmission
Ans: B
Ahead: The Classification of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
5. Which of these diseases has low pathogenicity?
A) Polio
B) Measles
C) Rabies
D) Chickenpox
Ans: A
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
6. What is an example of a weakly immunogenic organism?
A) HBV
B) Rubella
C) Polio
D) Neisseria gonorrhoeae
Ans: D
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
7. Generally, the acute response to infection is characterized by a predominance of _____ antibodies, but
later an IgG predominance emerges.
A) IgA
B) IgE
C) IgD
D) IgM
Ans: D
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
8. Which virus has shown persistent cyclical transmission even after widespread vaccination, especially
due to waning immunity?
A) Measles
B) Rubella
C) Pertussis
D) Influenza
, Ans: C
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
9. Why might respiratory infections increase during the winter?
A) Lower indoor humidity and crowding
B) Increased vitamin D exposure
C) Seasonal mosquito transmission
D) Enhanced immune response
Ans: A
Ahead: Epidemiologic Characteristics of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
10. The term attack rate is commonly used to describe which of the following?
A) Chronic disease progression
B) Cumulative incidence in outbreak settings
C) Mortality due to infection
D) The rate of hospital admissions
Ans: B
Ahead: Epidemiologic Studies of Infectious Diseases
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
11. Which of the following measures is most appropriate for use in a cohort study assessing new cases
over time?
A) Odds ratio
B) Prevalence ratio
C) Point prevalence
D) Risk ratio
Ans: D
Ahead: Population Comparisons and Epidemiologic Inference
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
12. Which study design describes data from a group of similar cases without a control group?
A) Case-control study
B) Case series
C) Ecologic study
D) Cross-sectional study
Ans: B
Ahead: Types of Epidemiologic Study Design
Subject: Chapter 2
Title: Epidemiology of Infectious Disease: General Principles
