usda.gov | Every year in the United States, on average: 5% to 20% of the population gets the fluA human pandemic is a global disease outbreak. A flu pandemic occurs when a new influenza (flu) virus emerges for which people have little or no immunity and for which there is no vaccine. The disease spreads easily person-to-person, causes serious illness, and can sweep across the country and around the world in very short time.
In a human pandemic, employee safety and health and business continuity are USDA's primary concerns.
It is difficult to predict when the next influenza pandemic will occur or how severe it will be.
