<p>Vaccination should be provided by a review of the medical history (especilly with regard to previous vaccination &amp; possible occurrence of the undesirable events) and a clinical examination. As with any vaccine immunization with the cholera vaccine may not protect 100% susceptible individuals. This vaccine is also not a substitute for therapy in case of individuals suspected to be suffering from cholera or showing signs and symptoms of an acute episode of gastro intestinal disease or acute watery diarrhea. Immunocompromised persons (subsequent to a disease or immunosuppressive therapy) may not obtain the expected immune response after vaccination with the cholera vaccine. If possible, in the opinion of the medical practitioner, due consideration should be given to postpone vaccination until after the completion of the immunosuppressive treatment. As with all vaccines, appropriate medical treatment should always be available in case of a rare event of anaphylactic reactions following the administration of the vaccine. For this reason, it is recommended that the vaccinee should remain under medical supervision for at least 30 minutes after vaccination.</p>