Smallpox, which was eradicated globally in 1980, is classed by the United States government as a category A bioterrorism agent because of its potential to spread rapidly, infect swathes of the population and incite widespread fear and panic.
Researchers at the University of New South Wales have used a mathematical model to predict how many people would become infected and how many would die in bioterrorism attacks on New York and Sydney. READ MORE