Secondary data
INFLUENZA
As the current COVID-19 pandemic had a considerable effect on influenza vaccination rates and at least on pneumococci vaccination rates, too, it is important to differentiate between a baseline before the pandemic and a baseline during the pandemic. The alterations in vaccination rates due to the pandemic will be determined by using the Interrupted Time Series Models (ITS).After the determination of the baselines, pre-post comparison analyses will be conducted for both outcomes differentiated by intervention and control group. The pre-post comparisons will be conducted by performing comparisons of means based on two-sided tests with significance levels of 5%. Under consideration of clustering, various influencing factors are taken into account.Furthermore, subgroup analyses such as for patients in nursing homes or for single vaccinations such as the pneumococci vaccination are planned. Finally, if a sufficiently high number of cases in all regions is reached, a comparing analysis of the vaccination uptake rates between the three regions will be conducted.