Vivotif is an oral vaccine used to prevent typhoid fever, a potentially severe and life-threatening illness caused by the bacterium Salmonella typhi. This live, attenuated vaccine is designed to stimulate the body's immune system to produce a protective response against typhoid fever without causing the disease itself. Vivotif is typically recommended for travelers to areas where typhoid fever is common, individuals living in endemic regions, or those who may be exposed to the bacteria through work or personal circumstances. The vaccine is administered in capsule form, taken orally, and the full course consists of multiple doses to ensure adequate immunity. It is important for individuals to complete the entire vaccination series for optimal protection and to follow the recommended timing of doses.