Discuss in detail about the countries, which have faced epidemics in the past.

Based on your understanding of the SARS case study, answer the following questions: In your opinion, what could be the possible reasons of a sudden outbreak of new disease? What are the ways of addressing a new and virulent contagious disease? Discuss in detail about the countries, which have faced epidemics in the past. What would have been the possible reasons for such outbreaks?