<p>The vaccine protects against typhoid fever caused by Salmonella typhi. Protection is not conferred against paratyphoid fever or illness caused by non-invasive Salmonella. Typhoid vaccine should not be administered to subjects with known hypersensitivity to any component of the vaccine or to subjects having shown signs of hypersensitivity after previous Typhoid vaccine administration or after any other vaccine containing Vi polysaccharide Salmonella typhi antigens. It may be expected that in patients receiving immunosuppressive treatment or patients with immunodeficiency, an adequate response may not be achieved. The administration of Typhoid vaccine should be postponed in subjects suffering from acute severe febrile illness.</p>