Urban Growth And SARS

"...[O]ur megacities, factory farms, jet planes and blood banks [are] opening broad new avenues for infection. The dark side of progress is now unmistakable; many of the advances that have made our lives more comfortable have also made them more dangerous. Some 30 new diseases have cropped up since the mid-1970s—causing tens of millions of deaths—and forgotten scourges have resurfaced with alarming regularity."