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IFN-γ levels in supernatants (collected at different time intervals) of short-term cultures of PBMC induced with BCG vaccine. Booster doses of BCG (2.5 μl) were given (indicated with arrow) after 24 & 48 hrs. Cells represent control group without vaccination, Cells+ B represent group receiving BCG vaccination without any booster dose, Cells + B1 represent group receiving only one booster dose of vaccine, Cells + B2 represents groups receiving two Booster doses of BCG vaccination.
