VI Capsular Polysaccharide Vaccine - Dosing

Dosing

The vaccine is injected either under the skin or into a muscle at least seven days before traveling to the typhoid-affected area (the CDC recommend 14 days). The vaccine is not effective in children under the age of two; children under the age of two would normally have all their food regulated by their parents and should therefore be expected to be at low risk of exposure to typhoid.

To maintain immunity, the vaccine should be repeated every three years.