The Immunization Newsletter is published in Spanish, English and French by the Comprehensive Family Immunization Unit of the Pan American Health Organization (PAHO), Regional Office for the Americas of the World Health Organization (WHO). Its purpose is to facilitate the exchange of ideas and information concerning immunization programs in the Region, in order to promote greater knowledge of the problems faced and their possible solutions. Prior to 2015, the Immunization Newsletter was published every two months, but it is currently being published quarterly.
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