africa/global: When disease becomes profitable

It is the biggest and most powerful drug company on the planet. Its famous blue diamond-shaped Viagra pills have made it a fortune beyond the dreams of small nation states and the butt of smutty jokes worldwide. But Pfizer's global reach has not turned the world's third largest business into a benevolent giant, according to its critics. Quite the contrary. The vast multinational stands accused of blocking reforms to global drug pricing that would help lift impoverished countries out of disease and spur their development.