5 n-count A medium is a substance or material which is used for a particular purpose or in order to produce a particular effect. Blood is the medium in which oxygen is carried to all parts of the body..., Hyatt has found a way of creating these qualities using the more permanent medium of oil paint.
An influenza pandemic is a global outbreak of disease that occurs when a new influenza A virus appears or âemergesâ in the human population, causes serious illness in people, and then spreads easily from person to person worldwide. Pandemics are different from seasonal outbreaks or âepidemicsâ of influenza.
The name has stuck and so it is still called the Swine Flu, Swine Influenza, Hog Flu, and Pig Flu in some places to the chagrin of the Pork Producers Association. See the related question below about what caused the pandemic swine flu for more detail on how the reassortant process created the new strain of pandemic flu.