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The effect of live measles vaccines on serum vitamin A levels in healthy children

Abstract Objective: Serum retinol levels have been shown to be depressed during measles infection. This study aims to demonstrate whether there is any decrease in serum vitamin A level following immunization with live viral vaccine and its relation with vaccine seroconversion in children with measles. Since many children receive measles vaccine alone or in combination with measles‐mumps‐rubella vaccine, we studied serum vitamin A levels and antibody levels in healthy, well‐nourished children before and after immunization with monovalent and combined live attenuated measles vaccine.