What is the recommended booster schedule for anthrax vaccine if continued immunity is needed?

What is the recommended booster schedule for anthrax vaccine if continued immunity is needed?

• A. Every two years
• B. Annually if continued immunity is needed
• C. Every five years
• D. Every ten years

Answer: (B)

Immunity from the anthrax vaccine wanes over time, so for anyone with ongoing exposure risk, a yearly booster is recommended to keep protective antibody levels high. After the initial vaccination series, antibody titers decline, and giving a booster each year rapidly raises those titers again and reinforces immune memory, helping ensure continued protection if exposure occurs. Longer intervals (every two, five, or ten years) allow protection to fall below the needed level in people who remain at risk, making annual boosters the best way to maintain effective immunity when continued protection is required.

Immunity from the anthrax vaccine wanes over time, so for anyone with ongoing exposure risk, a yearly booster is recommended to keep protective antibody levels high. After the initial vaccination series, antibody titers decline, and giving a booster each year rapidly raises those titers again and reinforces immune memory, helping ensure continued protection if exposure occurs. Longer intervals (every two, five, or ten years) allow protection to fall below the needed level in people who remain at risk, making annual boosters the best way to maintain effective immunity when continued protection is required.