A worldwide out break of a disease is called a pandemic.
Swine Flu -_- The 2009 swine flu outbreak was an pandemic of a new strain of Influenza A virus subtype H1N1 identified in April 2009. It was thought to be a mutation (reassortment) of four known strains of influenza A virus subtype H1N1: one endemic in humans, one endemic in birds, and two endemic in pigs (swine).[58] A June 5th update by the U.N.'s World Health Organization (WHO) states that “69 countries have officially reported 21,940 cases of influenza A(H1N1) infection, including 125 deaths.” [59] -- Source-http://www.answers.com/topic/2009-swine-flu-outbreak --
dark death
The 1918 Spanish Flu Pandemic did not bring about the end of WWI, but was likely spread more widely because of it. See Related Links.
The great flu pandemic of 1918 and 1919 is estimated to have killed between 30 million and 50 million people worldwide.
The Spanish influenza was a severe worldwide flu pandemic that occurred in 1918, causing millions of deaths. While it had devastating consequences, it is more commonly referred to as a pandemic rather than a plague, as plagues are typically associated with infectious diseases that spread rapidly and cause widespread illness and death over an extended period of time.
The influenza pandemic of 1918 to 1919, also known as the Spanish flu, killed millions of people worldwide. It is considered one of the deadliest pandemics in human history.
The World Health Organization (WHO) has developed a system for alerts and communication of the severity or spread of an influenza epidemic, for purposes of preparedness for an influenza pandemic (see below for definition of pandemic), for the US National Preparedness Plan. They have defined six phases of outbreaks that have potential to become an influenza pandemic.2011 ~ We are currently in the Post Pandemic Phase.A synopsis of each phase's definition is provided below, for the full information from the WHO, see the related links section near the bottom of this answer page.Phase 1In nature, flu viruses circulate continuously among animals. Even though such viruses might develop into pandemic viruses, no viruses circulating among animals at the present time have been reported to cause infections in humans.Phase 2An animal influenza virus that is currently circulating among domesticated or wild animals is known to have caused infection in humans, and is therefore considered a potential pandemic threat.Phase 3There are small clusters of animal-human virus infecting people at present, these are being monitored, but it has currently not resulted in human-to-human transmission frequency sufficient to sustain community-level outbreaks, which would be required to initiate pandemic proportions.Phase 4There is human-to-human transmission of animal or human-animal virus able to create sustained community level outbreaks which significantly raises the level of risk of a pandemic, but does not indicate that a pandemic is a fore-gone conclusion.Phase 5Large areas of human-to-human transmission are occurring, and the spread has extended to at least two countries in the same region, which is a strong signal that pandemic is imminent, and containment procedures and preparedness should be being finalized.Phase 6The Pandemic Phase. The community level outbreaks of the virus are continually spreading among people and to at least one other country in a second region globally, and WHO declares a global pandemic is under way.The Pandemic will progress through the post peak period of the pandemic phase and then to the post pandemic phase.The Post Pandemic PhaseWhen the peak period of infection has passed and only a few outbreaks here and there remain, the WHO will declare the pandemic is over and the Post Pandemic Phase is begun. There will be continued observation and monitoring during of waves of the pandemic recurring before finally returning to the normal seasonal levels.World Health Organization has announced that the world is now in the Post Pandemic Phase of the H1N1/09 pandemic.World Health Organization Definition of Pandemic:"An influenza pandemic occurs with the appearance of a new influenza virus against which none of us has any immunity. This results in several, simultaneous epidemics worldwide with high numbers of cases and deaths. With the increase in global transport and communications, as well as urbanization and overcrowded conditions, epidemics due to the new influenza virus are likely to be established quickly around the world."
Influenza
it never occured
18 months
During the same time as WW1 there was a pandemic of influenza that killed millions of people world wide. It is commonly called the Spanish Flu.
In 1914, the influenza epidemic that ended with the Pandemic of 1918 first started in Europe with episodes of purulent bronchitis. By the end of the Pandemic in 1919, approximately 50 million people died from either the purulent bronchitis or the actual influenza.
The Influenza Pandemic of 1918
For millions of people over the winter of 1918 to 1919, infection with the Spanish Flu was terminal or fatal - this was the largest pandemic of influenza on record, and is credited with helping to bring World War I to an end. However, not everyone who became infected with the Spanish Flu died of it, and there were millions of people who escaped being infected in the first place.
The pandemic has been declared over but there are still outbreaks in limited locations world wide. The specifics and counts of cases are no longer being tracked by CDC, WHO, and most US states. Influenza cases are monitored but specific H1N1/09 counts aren't available separately from other influenza reporting any longer.
The pandemic has been declared over but there are still outbreaks in limited locations world wide. The specifics and counts of cases are no longer being tracked by CDC, WHO, and most US states. Influenza cases are monitored, but specific H1N1/09 counts aren't available separately from other influenza reporting any longer.