NR 503 Final Exam Questions with Correct Answers & Rationales (Latest 2023/2024 Graded A+)
NR 503 Final Exam Questions with Correct Answers & Rationales (Latest 2023/2024 Graded A+). Immunity is the capacity of a single individual to avoid disease susceptibility when exposed to an infectious agent. Herd immunity is a population characteristic. For certain diseases, individual immunity can be acquired by vaccination, but this is not true for all infectious Question 4 Which of the following is characteristic of a single-exposure, common-vehicle outbreak? Long latency period before many illnesses develop There is an exponential increase in secondary cases following initial exposures Cases include only those who have been exposed to sick persons The epidemic curve has a normal distribution when plotted against the logarithm of time Wide range in incubation times for sick individuals Single-exposure, common-vehicle outbreaks involve a sudden, rapid increase in cases of disease that are limited to persons who share a common exposure. Additionally, few secondary cases develop among persons exposed to primary cases. A histogram of the outbreak can plot the number of cases by time of disease onset. In single-exposure, common-vehicle outbreaks, a log transformation of the time of disease onset will often take on the characteristic shape of a normal distribution (i.e., a bell curve) with the median incubation time found at the peak of the curve. What is the diarrhea attack rate in persons who ate both ice cream and pizza?
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