2.4.5 Challenges with blood collection in young children when using IGRAs (but TBST may be used)

IGRA TB infection tests should not be used in children aged 6 months to 2 years, because of insufficient data and the challenges of phlebotomy in this age group. TST or TBST may therefore be preferred. Testing household contacts below 5 years of age is not a prerequisite for providing TPT.

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