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.'

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.

The only people that can make peace are the parties to the conflict, and just as they are responsible for the conflict and its consequences, so should they be given responsibility and recognition for the peace.

Pakistan is not about to crack down on terror groups or cut its military budget in order to build roads, schools and hospitals.

Often, if there's something that I want to do, but somehow can't get myself to do, it's because I don't have clarity. This lack of clarity often arises from a feeling of ambivalence - I want to do something, but I don't want to do it; or I want one thing, but I also want something else that conflicts with it.

I vote for leaders, and honestly, I didn't vote much in the military because I served whoever is the commander-in-chief.