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EPI-Exam With Questions And Accurate Answers
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EPI-Exam With Questions And Accurate Answers1) Paolo becomes infected with the Zika virus on August 12th after being bitten by a
mosquito. On August 17th, five days later, he would still be able to test positive for the
virus through the use of a serum IgM antibody test. Ten days later, Paolo starts to feel
the symptoms of sickness, which are fever, chill, and muscle ache. Fifteen days later,
Paolo feels healthy again but will still test positive for the antibody for another 100 days.
What is the incubation period of Zika?
a. 5 days
b. 15 days
c. 30 days
d. 130 days - ANSWER 15 days
2) You are to take a random sample of 20 cows from a herd of 800. You line up the
animals and send them through a chute into another paddock, and you select every 40th
cow for your study. What type of sampling is this?
a. Systematic random sampling
b. Simple random sampling
c. Multi-stage sampling
d. Cluster sampling - ANSWER systematic random sampling
3) Obesity and wealth are inversely related in Mexico City. Which of the following is true
about the relationship between wealth and obesity?
a. OR>0
b. RD>1
c. RR<1
d. PAR>0 - ANSWER RR<1
4) The Black Death, an outbreak of bubonic plague originating in Central Asia and
,traveling along the Silk Road to Crimea and the remainder of Europe, occurred from
1346-53. It is estimated that 75 to 200 million people died from this pandemic. Which of
the following disease patterns best describes the Black Death?
a. Endemic
b. Epidemic
c. Sporadic
d. Pandemic - ANSWER pandemic
5) Which of the following statements correctly explains the distinction between the
terms "infected" and "diseased"?
a. Malaria is an infection but not a disease
b. A person whose blood is carrying the malaria protozoa is infected, but one showing
clinical symptoms of malaria is diseased
c. "Infected" and "diseased" are interchangeable terms
d. Individuals with the zombie virus in The Walking Dead are diseased, and once they
become zombies through reanimation they become infected - ANSWER b
6) Which of the following is the WHO definition of health?
a. A state of complete physical, mental, and social well-being, and not merely the
absence of disease or infirmity
b. The absence of disruption in the functioning of the whole body of the host or any of its
part
c. The absence of physiological/psychological disfunction
d. A state of physical well-being, including the absence of infection or illness - ANSWER
a
7) Which of the following below researcher determined through randomized trials with
British seamen that scurvy was caused of the lack of vitamin C?
a. James Lind
b. Percival Pott
c. John Snow
, d. Cathy Bauman - ANSWER a
8) HIV is of particular concern for pregnant women, who can pass the virus on to their
unborn children. Which of the following is this an example of?
a. Vector-borne disease
b. Vertical transmission of disease
c. Indirect transmission of disease
d. Horizontal transmission of disease - ANSWER b
9) West Nile virus originates in birds (where?) is picked up by mosquitoes (how?), and is
transported to humans (whom?) infected when the mosquito bites them. What are the
bird, mosquito and human (respectively) in this scenario?
a. Disease pool, fomite, host
b. Environment, agent, host
c. Reservoir, vector, host
d. Disease, indirect contact, infected ANSWER c
10) Donald Trump was just elected president of the US, but the majority of polls had
predicted otherwise. Some researchers believe this is because the pollsters
disproportionately sampled people from cities and didn't sample the rural areas,
populations which were more likely to get the support of Hillary Clinton. What type of
bias is this?
a. Confounding bias
b. Selection bias
c. Nonresponse bias
d. Misclassification bias ANSWER b
11) Joe Biden just won the US presidency, but the victory margin was far smaller than
the polls had anticipated. Some analysts think this is a function of Trump supporters
being more apt to decline to share their voting intentions-refused to disclose who they
would for or if they were going to vote-with pollsters. What type of bias is this?
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