The COVID-19 vaccination campaign in Switzerland and its impact on disease spread

We analyse infectious disease case surveillance data stratified by region and age group to estimate COVID-19 spread and gain an understanding of the impact of introducing vaccines to counter the disease in Switzerland. The data used in this work is extensive and detailed and includes information on weekly number of cases and vaccination rates by age and region. Our approach takes into account waning immunity. The statistical analysis allows us to determine the effects of choosing alternative vaccination strategies. Our results indicate greater uptake of vaccine would have led to fewer cases with a particularly large effect on undervaccinated regions while an alternative distribution scheme ignoring age would affect the vulnerable population at the time (the elderly) and is less ideal.