This week the billionaire philanthropist Bill Gates will deliver the annual BBC Richard Dimbleby Lecture in which he will spell out his commitment to ridding the world of Polio, the dreadfully infectious disease which can cause paralysis and even death within hours.
Bill Gates is the single most influential voice in global health, so when he turns his attention to an issue, it is worth listening.
The 2013 Richard Dimbleby Lecture will be shown on Tuesday 29 January on BBC One at 22:35 GMT.
Details of the talk, in which Gates outlined his aims to eradicate the world of Polio by 2018, can be read here. You can also view the lecture, available on BBC iPlayer until Feb 5th, here.