Impact of bariatric surgery on the effectiveness of serological response after COVID‑19 vaccination

The primary objective of the study is to determine whether bariatric surgery reversed the negative impact of obesity on the serological response after the COVID-19 vaccination. This objective is achieved in two steps: (a) quantifying the negative impact of obesity on the serological response after COVID-19 vaccination if it is present, and (b) testing whether bariatric surgery reversed this impact. The secondary objective was to monitor the occurrence of adverse events. It turned out that Vaccinating and bariatric surgery are safe and effective treatments in the serological response in patients who suffer from obesity.