A minimum age for measles vaccine administration to coloured children.

The antibody response to further-attenuated live virus measles vaccine was assessed in 67 Coloured children between the ages of 6 and 12 months. Children less than 9 months of age were found to have suboptimal seroconversion rates and it is recommended that the routine administration of measles vaccine should be restricted to children over the age of 8 months. High-risk groups and problems of vaccine administration and storage are discussed.