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Testing every 2 to 3 years is recommended for children who have been exposed to high-risk individuals and at age 4 to 6 for those living in high prevalence areas, those who travel to countries with high prevalence, and those whose parents have emigrated from countries with high prevalence of TB.
BCG (Bacilli Calmette-Guerin) is a vaccine widely used for the protection against tuberculosis. However, the degree of protection is only partial and not 100%.The vaccine is considered efficacious in young children but not so in adults.CG vaccination is not required if the child has a history of proven tuberculosis or is above 15 years of age. BCG vaccination is not recommended for children with the following health conditions: 1  Conditions with impaired immunity: 2  Any form of malignancy, in particular, leukaemia and lymphoma.