For the first time in history, we can track the evolution of a pandemic in real-time... Influenza viruses are notorious for their rapid mutation and unpredictable behaviour.
Margaret ChanFor a pandemic of moderate severity, this is one of our greatest challenges: helping people to understand when they do not need to worry, and when they do need to seek urgent care.
Margaret ChanDoctors and nurses, with their training and their experiences, they would be able to detect unusual patterns of disease. That's why we say it is important for every country to have a proper surveillance system. The function of the surveillance system is to detect unusual patterns of diseases.
Margaret Chan