In the SIR model, if S is 99 and I is 1 (total population is 100) at the beginning of a disease infection, which has R0 of 2 and average infectious period of 10 days. What is the transmission rate (beta)? a.0.1 b.0.2 c.0.002 d.2
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- In the SIR model, if S is 99 and I is 1 (total population is 100) at the beginning of a disease infection, which has R0 of 2 and average infectious period of 10 days. What is the transmission rate (beta)? a.0.1 b.0.2 c.0.002 d.2Does this epidemic curve suggest a point source or propagated epidemic? Justify your answer. What does the "moving averages" (black line) represent? bruefly explain this term in relation to the concept of "variability"?If the incidence rate of a very serious disease is 25/100,000 person-years and the prevalence of this disease in the population is 75/100,000, what is the average survival time of individuals who contract this disease? [Assume the population is in steady state] * Hint* Formula (D=P/IR)
- Which of the following does not refer(s) to distribution of a disease by time? a. Point epidemics b. Rural-urban differences c. Seasonal trends of a diseases d. Secular trend of the disease QUESTION 2 Which of the following statements is correct? a. A nuclear accident would probably result in cyclic patterns of health consequences b. The COVID-19 infection is an example of a point source epidemic c. If symptoms of depression experienced in a particular locality increase during certain months of every year, compared with other months in the same year, this is an example of secular trend in depressive symptoms d. Contamination of the drinking water source of a community by infectious agent(s) will likely result in a continuous common source epidemicCalculate the R0 for a susceptible population of 8,500 people for a disease with a transmission rate of 0.00004 and an infectious period of 6 days. Note that 1,000 of the people in this population have been vaccinated for this disease. R0= SβL Group of answer choices 2.04 1.80 2.28 1.42 0.64Which statistic below is the best example of incidence of a disease? A) In 2005, 2 million people died from HIV B) A total of 40 million people have died from HIV infection C) In 2005, 4 million people acquired HIV D) A total of 65 million people have gotten HIV E) 25 million people currently suffer from HIV infection
- using the population growth pyramids of italy and uganda,explain why the death toll of italy was very high if the disease affect the aged in the community?In a cohort study, the ratio of the incidence rate of a disease in an exposed group to the incidence rate of the disease in a nonexposed group is the: a. Relative risk b. Risk difference c. Prevalence ratio d. Odds ratioWhich of the following epidemiological study designs is the most useful to study incidence of an outcome or a disease? a. Ecological study b. Cross-sectional study c. Cohort study d. Descriptive study
- In a community in which R elderly people and people with comorbidities are susceptible to a particular SARS virus, the rate of growth of the spread of the virus was jointly proportional to the number of people who had caught the virus and the number of susceptible people who had not caught it. If 10 percent of those susceptible had the virus initially and 25 percent had been infected after 3 weeks, what percent of those susceptible had been infected after 6 weeks?There are two tests for a disease, one is rapid and the other is slow. Given that an individual is infected, the rapid test will register positive 40% of the time, while the slow test will register positive 80% of the time; additionally, both tests will be positive 35% of the time. Suppose in the above example that people not infected always test negative for both tests. Suppose in the above example that people not infected always test negative for both tests. 5. Of the people in the population who are tested, 75% of their results from the slow test are positive. What is the chance that a persons has the virus conditioned on getting negative result on the slow test?(You dont need an article or a website to answer the question) 1.On October 30, 2020 the Center for Disease Control (CDC) reported that the daily COVID-19 data showed there were 1.2 new infections per second and that the daily death rate was one death every 107 seconds. Answer the following questions. Show all your calculations and write a sentence about your conclusion: A.Use the CDC data to calculate the total number of daily infections on October 30th. B.How many deaths were reported on October 30th?