I have taken the content from
http://www.cdc.gov/mmwr/preview/mmwrhtml/00033455.htm and modified the
titles a bit. I hope the CDC won't mind.
For people who definitely have been exposed to HepB via sex,
needle-stick injury, etc.:
Persons who have written documentation of
a complete HepB vaccine series and who did not receive postvaccination
testing should receive a single vaccine booster dose
Persons who are
in the process of being vaccinated but who have not completed the
vaccine series should receive the appropriate dose of HepB immune
globulin (HBIG) and should complete the vaccine series
persons should receive both HBIG and the vaccine as soon as possible
after exposure (preferably within 24 hours). The vaccine may be
administered simultaneously with HBIG in a separate injection site. The
vaccine series should be completed in accordance with the
age-appropriate vaccine dose and schedule
For people who have been in risky situations but are not sure if they
have been exposed to HepB via sex, needle-stick injury, etc.:
with written documentation of a complete HepB vaccine series require no
Persons who are not fully vaccinated should
complete the vaccine series.
Unvaccinated persons should receive the
HepB vaccine series with the first dose administered as soon as
possible after exposure, preferably within 24 hours. The vaccine series
should be completed in accordance with the age-appropriate dose and
How long does it take for blood to test HBsAg-positive after exposure
HBsAg will be detected in an infected person’s blood an average of 4
weeks (range: 1–9 weeks) after exposure to the virus.
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