Category: Pandemic Flu Symptoms and Spread (Understanding Pandemic Flu)
HOW DOES PANDEMIC FLU OCCUR?
Flu viruses are always changing. While most changes are small and only cause slight variations in the virus, major changes can result in a completely new virus that people have not been able to build up immunity to. As a result, the pandemic virus can cause more serious illness and death in people, and spread more easily than the seasonal flu virus.
Return to FAQ's