| Anti-HBs concentration after basic
immunization |
Recommended time for revaccination |
| below 10 IU/L |
Immediately |
| 10-100 IU/L |
after 3-6 months |
| 100-1,000 IU/L |
after one year |
| 1,000-10,000 IU/L |
after 3.5 year |
| Above 10,000 IU/L |
after 7 years |
Antibody level of 10 IU/L was the clinically recognized immunity threshold (minimal
protective level) according to the recommendations of the CDC Immunization Practices
Advisory Committee (MMWR, 40 RR13:1-25, 1991) [16]. |
