Margaret Chan

A health system that lacks commodities for managing high-mortality infectious diseases and the main killers of mothers and young children will not have an adequate impact. By the same token, even the best-stocked delivery system will have an inadequate impact if it fails to reach the poor.

When you wash your hands, when you make a cup of coffee, when you're waiting for the elevator - instead of indulging in thinking, these are all opportunities for being there as a still, alert presence.

Having a Congress with a more diverse educational and professional background would serve the country well. And given the budget challenges facing America today, we might benefit from a few more cold, calculating problem solvers, and fewer courtroom impresarios.

Astonishingly, in spite of decades of research, there is no agreed theory of cancer, no explanation for why, inside almost all healthy cells, there lurks a highly efficient cancer subroutine that can be activated by a variety of agents - radiation, chemicals, inflammation and infection.