Question: How would you test to see whether a particular influenza vaccine protects elderly people from influenza? View Available Hint(s)for Part A Track the rise in vaccination rates among the elderly over a period of years. Compare infection rates among groups administered the vaccine and those not receiving the vaccine. Speculate that elderly people who were immunized will have fewer hospital stays and deaths during the winter after vaccination. Conclude that elderly people are less likely to be hospitalized or die following vaccination.