Insight: Revived search for a TB vaccine may be about to pay off

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A research nurse gives an infant a check-up as part of a clinical trial to develop new TB vaccines at the South African Tuberculosis Vaccine Initiative’s clinical trial field site in Worcester, South Africa in this April 2012 handout photo obtained by Reuters February 1, 2013. Global health experts are eagerly awaiting clinical trial results - expected early next week - of MVA85A, the first new vaccine in 90 years designed to prevent tuberculosis infections. REUTERS/Aeras/Handout