Oral typhoid vaccine is a medication used to prevent typhoid fever, a bacterial infection caused by Salmonella Typhi [1]. It's a live attenuated vaccine, meaning it contains a weakened form of the live bacteria that can't cause the full-blown illness [2]. Here's a closer look at how it works and when it might be recommended:
How it Works:
- When taken orally, the weakened bacteria in the vaccine stimulate the body's immune system to develop antibodies against Salmonella Typhi [2]. These antibodies help the body fight off future infection if exposed to the actual typhoid bacteria.
Who Should Consider It:
- The CDC recommends oral typhoid vaccination for people traveling to areas where typhoid fever is common [3]. This includes parts of South Asia, Africa, Latin America, and Southeast Asia [1].
Benefits:
- Oral typhoid vaccine is generally safe and effective in preventing typhoid fever. It can offer up to 70% protection for several years after vaccination [2, 3].
Dosage and Administration:
- Unlike injectable vaccines, the oral typhoid vaccine comes in capsules that are typically taken every other day for a total of 4 doses [2, 3].
- It's important to complete all four doses to ensure optimal protection.
- The recommended timing for receiving the vaccine depends on your travel itinerary. Ideally, it should be taken at least one week to one month before travel to allow the body sufficient time to develop immunity [3].