A 34-year-old female asked:
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How much immunity does the first Hepatitis B vaccine shot provide?

1 doctor answer
Dr. Neigatha Graney
36 years experience in Pediatrics
One Dose Not Enough: Hepatitis B virus occurs world wide; is a cause of serious liver disease; is transmitted thru blood/body fluids. Immunization is effective for prevention & post-exposure management. Vaccination after 2 doses provides protection in up to 80% of recipients and protects 90-95% after 3 doses. Blood test to confirm immunity after vaccination recommended for certain risk groups. Discuss with doctor.
Answered on Mar 23, 2015

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