Statistical analyses
FLU, INFLUENZA
Survey results were reported as frequencies and percentages. We calculated the differences in the number of vaccinated older participants between the intervention and control groups during the 2016–2017 flu season (baseline comparison) and the 2017–2018 flu season. The differences in knowledge, attitude, vaccination status, reasons for not taking vaccination, the information access to the influenza vaccination related knowledge among older participants before and after the implementation of free influenza vaccination program were assessed by Chi-square tests. A two-sided 