Typhoid is a disease that strikes the most vulnerable, and refugees are no exception. This autumn, flooding and rains have ushered in outbreaks of typhoid and other diseases in two refugee camps in South Sudan and North Darfur.

It takes more than a vaccine to make a successful immunization program. This World Immunization Week, we are taking a look at some of the factors that contribute to effective immunization programs.

By Dr. Jon Andrus, Executive Vice President of the Sabin Vaccine Institute and Director of the Vaccine Advocacy and Education Program

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