We've taken on the major health problems of the poorest - tuberculosis, maternal mortality, AIDS, malaria - in four countries. We've scored some victories in the sense that we've cured or treated thousands and changed the discourse about what is possible.

I think we will see better vaccines within the next 15 years, but I'm not a scientist and am focused on the short-term - what will happen in the interim.

If you look just at the decades after 1934, you know it's hard to point to really inspired and positive support from outside of Haiti, to Haiti, and much easier to point to either small-minded or downright mean-spirited policies.

I recommend the same therapies for all humans with HIV. There is no reason to believe that physiologic responses to therapy will vary across lines of class, culture, race or nationality.

lean water and health care and school and food and tin roofs and cement floor, all of these things should constitute a set of basics that people must have as birthrights.

I'm not an austere person.

Civil and political rights are critical, but not often the real problem for the destitute sick. My patients in Haiti can now vote but they can't get medical care or clean water.