title: False positive Hepatitis B Surface Antigen due to recent vaccination.
abstract: OBJECTIVE
  Hepatitis B is the most common viral hepatitis, potentially life threatening, with long term complications. Currently, vaccine is the most effective tool against hepatitis B infection. It is worthwhile mentioning that due to rampant use of hepatitis B vaccine (HBV), there have been concerns about hepatitis B surface antigen (HBsAg) reactivity. This article aims to report the false positive results of HBsAg due to recent HBV among healthy male adults.
  
  
  METHODS
  The subjects were selected from a Community Health Center, under the umbrella of a tertiary care hospital, Saudi Arabia. The data was retrieved from electronic medical records maintained at the clinic.
  
  
  RESULTS
  A total of 130 employees were recruited, only 117 records could be retrieved from the system. The mean age of participants was 31.34 ± 12.73 years. The administration of HBV and HBsAg test was performed simultaneously. The lab reported three cases of HBsAg positivity, a false positive result of 2.56%. Repeat testing after one week for HBsAg was negative for the three cases.
  
  
  CONCLUSIONS
  This study confirmed that HBsAg reactivity might be seen in regular screening programs for healthy adults.
authors.affiliation: Consultant, Family Medicine, International Medical Center, Satellite Clinic, Saudi Arabia.
authors.forename: Qudsia
authors.initials: Q
authors.lastname: Anjum