The Carso Health Institute -- Latin America's answer to the Bill & Melinda Gates Foundation -- operates from calm and stylish offices set in gardens facing a colonial-era mansion. But it has plenty of work even just outside its walls.
Carlos Slim - who, by some accounts, is now wealthier than Mr Gates - has concentrated on the growing epidemic of chronic disease in Mexico and globally.
By expanding the extent and profile of his philanthropy, Mr Slim has set an example for billionaires from emerging markets who are beginning to show interest in the field, notably in Latin America. The region is better known for sharp inequalities in wealth than for private initiatives to help bridge the gap.
[The Financial Times]