1. The emergence of an outbreak is becoming more and more frequent and getting more difficult to contain.
2. The World At Risk 2019 report stated that epidemic-prone diseases such as influenza, SARS, MERS, EBOLA, Zika, plague, yellow fever, and others, are indicators of a new era of high-impact, potentially fast-spreading outbreaks.
3. A major reason for these outbreaks to recur points to human behavior and their lifestyle.
4. Increase in the human interaction with the wildlife population results in human beings coming into contact with new animal populations. These species come with new and different kinds of diseases and viruses.
5. Other reasons range from various ecological, political, economic, and social trends such as population growth, urbanization, economic integration, faster travel, migration, and climate change.