How frequently should the injectable Typhoid vaccine be boosted?

The injectable Typhoid vaccine should be boosted every 2 years to ensure optimal immunity, particularly for individuals who are at continued risk of exposure to Typhoid fever, such as travelers to endemic areas and those in certain occupational roles. This two-year interval is based on clinical guidelines that recommend revaccination for individuals needing sustained protection against this bacterial infection.

In contrast, the oral Typhoid vaccine may have different recommendations for boosters, which is likely a source of confusion. The effective duration of immunity provided by the injectable form necessitates that the vaccination schedule includes a booster every 2 years for ongoing protection, making it critical for those who may be exposed to the disease.