a large scale epidemic lief ericson of the
a worldwide event caused by a new influenza virus to which humans have no immunity
a world wide infection in people with an influenza virus
Worldwide epidemic of the disease also known as 'Spanish flu'. Killed as many as 30 million people between 1918 and 1920.
An influenza pandemic is a large scale epidemic of the influenza virus, such as the 1918 Spanish flu. The World Health Organization (WHO) warns that there is a substantial risk of an influenza pandemic within the next few years. One of the strongest candidates is a highly pathogenic variation of the H5 N1 subtype of Influenza A virus which is rapidly mutating and could mutate into a variation that transmits easily human to human causing a pandemic.