The yield of contact tracing from source case investigation of children with sentinel TB: The number needed to screen* (NNS) and the number needed to contact trace† (NNCT).

Footnote:*The minimal number of caregivers and household contacts that require screening (NNS) to identify one person with newly-diagnosed TB disease, HIV infection, or one HIV-infected person who requires immediate ART.†The number needed to contact trace (NNCT) refers to the minimum number of index children needed to initiate contact tracing to identify one person with newly-diagnosed TB disease, HIV infection, or one HIV-infected person who requires immediate ART.The yield of contact tracing from source case investigation of children with sentinel TB: The number needed to screen* (NNS) and the number needed to contact trace† (NNCT).