Dr Seth Berkley, President of the International Aids Vaccine Initiative, said that time was now of the essence.

BBC: HIV vaccine trials 'within months'

Seth Berkley: Leadership is about vision and responsibility, not power.

FORBES: GAVI Alliance CEO: Leadership Is About Vision and Responsibility, Not Power

Seth Berkley: The GAVI Alliance has achieved many things in its first dozen years, but none more important than helping save more than 5.5 million lives and prevent untold illness and suffering.

FORBES: GAVI Alliance CEO: Leadership Is About Vision and Responsibility, Not Power

Seth Berkley joined the GAVI Alliance as CEO in August 2011, as it launched its five year strategy to immunize a quarter of a billion children in the developing world with life-saving vaccines by 2015.

FORBES: GAVI Alliance CEO: Leadership Is About Vision and Responsibility, Not Power