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Pictures | Fri Feb 1, 2013 | 1:49pm EST

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

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

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...more

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
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An infant receives an injection as part of a clinical trial of a novel tuberculosis vaccine candidate 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

An infant receives an injection as part of a clinical trial of a novel tuberculosis vaccine candidate at the South African Tuberculosis Vaccine Initiative’s clinical trial field site in Worcester, South Africa in this April 2012 handout photo...more

An infant receives an injection as part of a clinical trial of a novel tuberculosis vaccine candidate 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
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Mothers and their infants await appointments with health researchers 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. REUTERS/Aeras/Handout

Mothers and their infants await appointments with health researchers 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...more

Mothers and their infants await appointments with health researchers 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. REUTERS/Aeras/Handout
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