a pandemic
Examples
For 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.
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.
While today no foreign invaders threaten our sovereignty, there's another front that is on the line - our economy. Like a pandemic plague, worldwide recession now engulfs all nations. If stable, prosperous democracies are floundering in its wake, what more of developing countries such as ours?
A pandemic influenza would mean widespread infection essentially throughout every region of the world.
After all it really is all of humanity that is under threat during a pandemic.
It may be something that becomes endemic that we have to just be careful about. Certainly it's not going to be a pandemic for a lot longer because I believe the vaccines are going to turn that around.