When you're dealing with a very sick person and you're doing something to them, an intervention, be it a procedure or a medication, safety is critical.

You can have an epidemic in a state. You can have it in a region. You can have it in a country where the critical level of disease passes a certain threshold, and we call that an 'epidemic threshold.'

It is now widely recognized that any attempt at malaria eradication must be a long-term commitment that involves multiple interventions, disciplines, strategies and organizations.

The world is a place that is so interconnected that what happens in another part of the world will impact us.

The greatest discovery of my generation is that human beings can alter their lives by altering their attitudes of mind.

I moved to MIT from Stanford in 1984 to teach, and became the founding director of MIT's Computer Science and Artificial Intelligence Lab.

Governments should want and even crave the best possible scientific advice. With reliable knowledge come better decisions, fewer mistakes and more results achieved for each pound spent.

It is my deliberate opinion that the one essential requisite of human welfare in all ways is scientific knowledge of human nature.