Example Influenza Vaccine Picture the Scenario According to the Centers for Disease Control and Prevention, the single best way to protect against the flu is to be vaccinated. Traditionally, flu vaccines are manufactured using viruses grown in chicken eggs. A new method allows grow- ing viruses in cell cultures instead. To test the effectiveness of such vaccines, in a recent clinical trial n = 3900 randomly selected healthy subjects aged 18-49 received a cell-derived influenza vaccine by injection. During a follow-up pe- riod of approximately 28 weeks, each subject was assessed whether he or she developed influenza, which happened for 26 of the 3900 subjects. Construct and interpret a 95% and 99% confidence interval. Then compare them