Dr Gill Samuel is an award winning scientist who led the team that created Viagra.  A great innovator, Gill is continuously working with a variety of teams to look for cures for diseases that blight people in different parts of the world.  She is currently working with a team on a cure for HIV/Aids which will be launched in 2010.  As a woman who has never allowed glass ceilings to keep her down, she has great words of advice for other female scientists – don’t give up, keep on going!