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Production of IFN-γ in whole blood during growth of BCG lux in infants pre- and post-BCG vaccination, unvaccinated infants, and adult controls. Triplicate whole-blood samples of infants pre (○)- and post (•)-BCG vaccination (n = 33), unvaccinated control infants (×) (n = 4), and adult controls (T1 [▴], n = 6; T2 [▾], n = 6) were infected with BCG lux, and supernatants were harvested at 96 h. IFN-γ was measured in these supernatants by ELISA.
