Karimi, A. Arjomandi, A. Al Borzi, A. Rasouli, M. Kadivar, M.R. Obood, B. Pourabbas, B. 2004 An outbreak of measles due to secondary vaccine failure prompted this investigation into the prevalence of measles antibody in children. We studied 608 children in 7 different age groups: 6, 9, 14 and 18 months and 6, 10 and 15 years. Children in the 2 youngest groups received no vaccination the rest were vaccinated at 9 months and 15 months. The 15 year old age group received an additional vaccination. Transplacental measles antibody Ab decreased from 10.0 at 6 months to 0 at 9 months. Measles Ab was positive in 52.9 14 months , 89.4 18 ...