Relationship between antibody titer than the Incidence of Infection After Complete Dose of COVID-19 Astrazeneca Vaccination Based on Sociodemographics

Background: Vaccine is an essential tool to limit the health of the COVID -19 pandemic and one of the vaccines that got permitted to used is AstraZeneca Vaccine. The base of the AstraZeneca is the viral vector vaccine. This vaccine has a more advanced method that uses a modified virus to trigger antibodies to make herd immunity for people. Objective: To found correlation between antibody titer than the incidence of Covid infection after complete dose vaccination base on sociodemographics Method: Observasional prospective Cohort method was use in this study with a convenience sampling design. Inclusion criteria were all Indonesian citizens above 18 years old (n=113) who were vaccinated at UTA 45 Jakarta Vaccine Center with no history of COVID -19 before the vaccination and had filled up the informed consents. Results: there were 43 (38%) respondents infected Covid-19 after vaccinated full dosesConclusion: Base on this study, it was found that there was a correlation between sociodemographics after vaccinated full doses AstraZeneca, gender, age, comorbid, smoking, and drinking than infected Covid -19 (P-value < 0.05)). Keywords: Astrazeneca vaccine, Antibody titer, COVID-19.