How many shots are given in the Hepatitis B vaccine series?

How many shots are given in the Hepatitis B vaccine series?

• A. Two
• B. Three
• C. Four
• D. One

Answer: (B)

Immunity from the hepatitis B vaccine is built through a three-dose series. The first dose primes the immune system, the second dose boosts the response, and the third dose completes the regimen to establish durable protection with protective antibody levels. Typical schedules: infants start at birth with doses around 1–2 months and then at 6–18 months, while adults commonly follow 0, 1, and 6 months. A single or two-dose series does not reliably confer long-lasting protection, so the full three-shot series is needed for most people.

Immunity from the hepatitis B vaccine is built through a three-dose series. The first dose primes the immune system, the second dose boosts the response, and the third dose completes the regimen to establish durable protection with protective antibody levels. Typical schedules: infants start at birth with doses around 1–2 months and then at 6–18 months, while adults commonly follow 0, 1, and 6 months. A single or two-dose series does not reliably confer long-lasting protection, so the full three-shot series is needed for most people.