did I still believe that innovation could solve theworld's toughest problems?
I promised myself that before I came back to Africa,
I would find out more about what keeps people poor.
Over the years, Melinda and I did learn more about the pressing needs of the poor.
On a later trip to South Africa,
I paid a visit to a hospital for patients with MDR-TB,
multidrug resistant tuberculosis,
a disease with a cure rate of under 50%.
I remember that hospital as a place of despair.
It was a giant open ward,
with a sea of patients shuffling around in pajamas, wearing masks.
There was one floor just for children, including some babies lying in bed.
They had a little school for kids who were well enough to learn,
but many of the children couldn't make it,
and the hospital didn't seem to know whether it was worth it to keep the school open.
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