Children who are healthy - and have adequate nutrition - are much more likely to attend school. People who finish school and do well have higher earning potential in their adult lives.

Without strong health systems in place, the higher the population density, the more difficult it becomes to prevent and control outbreaks, and not just because of the increased risk of contagion.

As megacities like Mexico City and Lagos become increasingly common, we could see a rise of the urban epidemic and a new era of infectious disease threatening global health security.

Seth Berkley Quotes