Question

Question

For the influenza season 2014-15, there was some question about the effectiveness of the vaccine. In order to determine whether the vaccine even had an effect in preventing the flue, we gathered the following: Did you get the flu in 2014-15? Were you Vaccinated Yes No Totals No 332 580 912 Yes 621 1254 1875 Totals 953 1834 2787 Ok…. So with this data: What is the probability that you got the flu given you were not vaccinated? I.e. the Probability (got the flu │ you were not vaccinated)? (1) What is the probability that you got the flu given you were vaccinated? I.e. the Probability (got the flu │ you were vaccinated)? (1) What is the Relative Risk? (2) Interpret (1)

Answer 1

Please don't hesitate to give a "thumbs up" for the answer in case the answer has helped you

a. P(given not vaccinated, got flu) = had flu when not vaccinated/ total not vaccinated = 332/912 = .3640

b. P(given vaccinated , got flu) = had vaccinated and got flu / total vaccinated = 621/1875 = .3312

c. relative risk = (621/1875) / (332/912) = .3312/.3640 = .9099