how effective is the use of the influenza vaccine at preventing flu

For patients of 70 years and older, how effective is the use of the influenza vaccine at preventing flu as compared to patients who have not received the vaccine?

The research design would be quantitative and interventional as this theoretical question uses statistical data that numerically defines the impact of the flu vaccine on the prevention of developing the flu of elderly persons.

Rational for choosing this design is that it encompasses the criteria for a quantitative design as it approaches the problem in “black and white” and gives statistical data to prove or disprove the impact of the flu vaccine on the elderly population in regards to the prevention of the flu.  Within the study findings by the Centers for Disease Control and Prevention (CDC) within a study that addressed all ages and further delineated those aged greater than 65 years. The findings of the study concluded for all participants of the study by the CDC (2018) as follows, “Vaccine effectiveness was estimated as 100% x (1 – odds ratio [ratio of odds of being vaccinated among outpatients with influenza-positive test results to the odds of being vaccinated among outpatients with influenza-negative test results]); odds ratios were estimated using logistic regression.
Statistically significant at the p<0.05 level” (table 2).

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