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.

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.

Although it is still important to develop an HIV vaccine, we have significant tools already at our disposal that can make a major impact on the trajectory of this epidemic.

Photography seduces us into thinking we can believe photographs, whereas we can't really believe that a picture can tell us any kind of truth at all.

For 13 to be unlucky would require there to be some kind of cosmic intelligence that counts things that humans count and that also makes certain things happen on certain dates or in certain places according to whether the number 13 'is involved' or not (whatever 'is involved' might mean).

I have 1.4 million followers on Twitter. I get very interesting, sometimes very diverse input from my followers. So it's sort of like this water cooler, digital water cooler, if you want to think about it, where you go and you listen to conversations that are happening that perhaps will shape your thinking.

It's been pretty effortless with Sensa because I am not thinking about how long do I need to do this. Usually, when you stop a diet program, you lose control again. But I don't need to stop what I'm doing. I'm eating everything that I like. Sensa just helps me keep it all in check.