(CNN Spanish) – In January, the World Health Organization (WHO) declared that the new outbreak coronavirus, with epicenter in Wuhan, China, was a Public health emergency of international interest. However, some experts claim that Covid-19, the official name of the new coronavirus, its coming To be a pandemic.
A pandemic is the “world spread” of a new disease.
These have been part of the history of mankind for centuries, and one of the first in history dates back to 1580. Since then, at least four influenza pandemics occurred in the nineteenth century and three in the twentieth century, according to the Centers for the Control and Prevention of Diseases of the USA. (CDC).
An announcement from the government of the city of Buenos Aires gives advice on how to avoid becoming infected with the influenza A (H1N1) virus, at a subway station in Buenos Aires on July 7, 2009. (JUAN MABROMATA / AFP via Getty Images )
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The last pandemic declared by WHO was the H1N1 influenza virus.
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Chronology
This is how the H1N1 virus developed according the CDC:
April 15, 2009: The first case of infection in humans with influenza A H1N1 virus is detected in California.
April 25, 2009: WHO declared a state of public health emergency of international interest.
April 27, 2009: The WHO director general intensified the alert level for an influenza pandemic from phase 3 to phase 4, according to data showing the spread from person to person and the ability of the virus to cause outbreaks in communities.
April 29, 2009: WHO intensified the alert level for an influenza pandemic from phase 4 to phase 5 to indicate that a pandemic was imminent and requested that all countries immediately activate their pandemic preparedness plans and be alert to rare outbreaks of diseases similar to influenza and severe pneumonia.
The activity of the 2009 H1N1 influenza virus in the summer peaked at U.S during May and June.
June 11, 2009: WHO declared the pandemic and raised the global pandemic alert level to Phase 6 indicating that the virus was spreading in other parts of the world.
September 15, 2009: The FDA announced the approval of four 2009 H1N1 influenza vaccines.
Doses of the H1N1 flu vaccine are shown at Carlin Springs Elementary School on January 7, 2010 in Arlington, Virginia. (Photo by Win McNamee / Getty Images)
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The second wave of H1N1 influenza activity peaked in the US. UU. at the end of October 2009.
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In January 2010 the activity decreased below the reference level, but persisted for several months with low levels.
August 11, 2010: WHO announced the end of the 2009 H1N1 influenza pandemic.
characteristics
U.S estimated that between 151,700 and 575,400 people in the world died from infection with the influenza virus (H1N1) pdm09, known as A H1N1, during the first year the virus circulated.
Globally, it was estimated that the 80% of deaths Influenza-related virus occurred among people under 65.
Moderna sent her coronavirus vaccine for testing.
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The most serious pandemic in recent history was the 1918 flu, sometimes called “Spanish flu”. It is estimated that it infected about 500 million people or a third of the world’s population and killed about 50 million worldwide.
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