Vivotif Oral contains live bacteria called Salmonella typhi strain Ty21a, which do not cause typhoid fever.
Vivotif Oral works by causing the body to produce its own protection against the bacteria (germs) which cause typhoid fever.
The body makes antibodies, which destroy the Salmonella typhi bacteria.
Vivotif is an oral vaccine indicated to prevent typhoid fever, a potentially severe and life-threatening infection caused by the bacterium Salmonella enterica serotype Typhi (S Typhi).
Vivotif Oral requires a full course of 3 doses (tablets).
Taken orally, the vaccine is delivered to the mucosal surface of the gastrointestinal tract—the largest immunologic organ in the body.