This research is a cross-sectional study with a descriptive-analytic design, community-based, of adults who live in Surakarta (age 18 years and over) using the Google form. The inclusion criteria were health workers receiving the third or second dose of the COVID-19 vaccine. Quantitative antibody titers are checked at Prodia's laboratory. Other variables examined were the number and date of vaccination, age, sex, comorbid diseases, body mass index, AEFI symptoms after the vaccine, and history of being infected with COVID-19. In the statistical analysis using the different and regression correlation tests, the significance level of P is less than 0.05.
This descriptive study examines neutralizing antibody levels against COVID-19 in health workers before and after the 2nd booster of the COVID-19 vaccine in Surakarta, Indonesia.