B. Justinian Plague
Pandemics are infectious disease outbreaks that affect a large proportion of the population across a large geographic area. There have been several pandemics in history. The bubonic plague that ravaged Constantinople in the sixth century was called the Justinian Plague. Many people have died as a result of today's AIDS pandemic. Because of this, economic productivity in some counties has declined. The avian flu has health professionals worried about the possibility of a future pandemic. Currently, the avian flu virus can spread from bird to bird and from birds to humans. The World Health Organization is helping nations to prepare for future outbreaks by encouraging them to invest in vaccine research and stockpile anti-viral medications.
