"Influenza A, a contagious viral respiratory disease, causes widespread infection in all age groups every year. Global epidemics of a novel influenza strain, known as pandemics, occur intermittently when Influenza A evolves into a significantly different subtype of the virus to which humans have no immunity. Influenza pandemics occurred three times in the 20th century (1918, 1957, and 1968). Over 500,000 deaths occurred in the United States in the 1918 pandemic; in 1957 and 1968 mortality was much less, with US deaths of 90,000 and 30,000, respectively. When the next pandemic occurs, people across the globe will be affected within a few months, which will severely limit options to provide mutual aid across jurisdictions and for which a new vaccine will not be available for months to years. [...] The purpose of the Oregon Pandemic Influenza Emergency Response Plan is to lessen the impact of an influenza pandemic on the residents of Oregon. This plan focuses on elements unique to an influenza pandemic."
2008 State of Oregon
State of Oregon: http://oregon.gov