History of Pandemic Flu

In 2009, the World Health Organization announced a statement stating that the world is in the state of H5N1 after the pandemic. This is a very interesting news. Therefore, I think that I have not seen how much the pandemic is bad by tracing the history of influenza. Therefore, H5N1 is a highly pathogenic avian flu. This was caused by the serious occurrence of poultry. It occurs primarily in the Middle East and Asia. There are many kinds of H5N1, one is poultry and the other is pig. In the case of birds, there are few records by this human being, but since 2003 there have been 650 cases in 15 countries.

Widespread disease that is stable in terms of how many people are sick is not a pandemic. In addition, influenza epidemics usually do not include recurrence of seasonal influenza. Throughout history, there are many epidemics such as smallpox and tuberculosis. One of the most devastating epidemics is black death, in which more than 75 million people died in 1350. Recent pandemics include HIV epidemics in 1918 and 2009 and epidemics of H1N1 influenza. The World Health Organization (WHO) has a six-step classification that explains the new influenza virus process from the first few infections to the epidemic. This begins with the virus primarily infecting animals. In that case, the animal will be infected by humans, then the virus will begin spreading directly from person to person and will end in a pandemic when new virus infection spreads all over the world. Unmanageable until stopped

In 1918, the influenza virus spread all over the world, causing a global epidemic. This epidemic is called 1918 or the Spanish flu. This is caused by an influenza A (H1N1) virus that scientists believe are mutating from influenza virus previously infected only to birds. Its evolution and change are sufficient to infect humans and spread quickly among people. Since this type of influenza virus has never been infected, it will soon infect many people.

The 1918 influenza pandemic epidemic (January 1918 - December 1920; commonly known as the Spanish flu) is a very lethal influenza epidemic, and two epidemic diseases involving the H1N1 influenza virus It was the first one. 500 million people are infected worldwide, including distant islands of the Pacific and the Arctic Circle, killing between 500 million to 100 million people (3% to 5% of the world's population), becoming the most fatal natural disaster in the world It is. It is one. Human history infectious diseases had limited life expectancy at the beginning of the 20th century. However, in the first year of the pandemic, the average life expectancy of the US has decreased by about 12 years. Most influenza outbreaks excessively kill the young, elderly, or debilitated patients, but in contrast, the 1918 world epidemic mainly killed healthy young people.