Tuberculin sensitivity in BCG vaccinated children

ABSTRACT

This work has been carried out in order to evaluate the waning of tuberculin sensitivity after BCG vaccination in three age groups 2 years, 6 years and 10 years. Each group included 1000 children. The study revealed an unexpected high figure of negative reaction in all groups, denoting early waning of tuberculin sensitivity with maximum waning at age of 2 years, with a slow progression. It was recommended to boost primary vaccination during early infancy by revaccination earlier than the present policy of giving the vaccine at the age of 6