Readers ask: Why does flu start in china?

Why do influenza infections always begin in Asia?

Most influenza viruses that infect humans seem to originate in parts of Asia, where close contact between livestock and people creates a hospitable environment for mutation and transmission of viruses.

Where does the flu virus come from each year?

Answer: Influenza is a virus that’s spread from person to person. It originates, actually, among birds and other animals such as pigs, and new viral strains of influenza come to this country and to Europe from Southeast Asia. That’s the global pattern.

What started the flu virus?

It was caused by an H1N1 virus with genes of avian origin. Although there is not universal consensus regarding where the virus originated, it spread worldwide during 1918-1919. In the United States, it was first identified in military personnel in spring 1918.

Why does flu start in the Far East?

Among their findings: seasonal flu originates in eastern and Southeast Asia. The result broadens previous hypotheses that such viruses emerged in China or exclusively in tropical regions. (Flu shots, which are actually a weakened form of the virus used to prime the immune system, are essentially based on this protein.)

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Why does the flu keep coming back?

These viruses spread seasonally each year because of a phenomenon known as antigenic drift: They evolve just enough to evade human immune systems, but not enough to develop into completely new versions of the virus.

Is the Spanish flu still around?

Descendants of the 1918 H1N1 virus make up the influenza viruses we’re fighting today. “The 1918 flu is still with us, in that sense,” said Ann Reid, the executive director of the National Center for Science Education who successfully sequenced the genetic makeup of the 1918 influenza virus in the 1990s.

Where did the Spanish flu start?

While it’s unlikely that the “Spanish Flu” originated in Spain, scientists are still unsure of its source. France, China and Britain have all been suggested as the potential birthplace of the virus, as has the United States, where the first known case was reported at a military base in Kansas on March 11, 1918.

What is the currently the most common flu type in humans?

Influenza A is the most common, followed by influenza B. Both are highly contagious, and their symptoms are similar. Influenza, also known as the flu, is a viral respiratory illness that is most prevalent during fall and winter months.

How does the flu spread around the world?

How does the influenza virus spread around the world? Influenza is carried by people from place to place, transmitted from person to person mostly by coughs, sneezes and breathing. In temperate climates of both the northern and southern hemispheres, the influenza season happens in the winter.

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What was the last pandemic?

The 1918 influenza pandemic was the most severe pandemic in recent history. It was caused by an H1N1 virus with genes of avian origin. Although there is not universal consensus regarding where the virus originated, it spread worldwide during 1918-1919.

Where did Ebola come from?

Ebola virus disease ( EVD ) is a severe disease caused by Ebola virus, a member of the filovirus family, which occurs in humans and other primates. The disease emerged in 1976 in almost simultaneous outbreaks in the Democratic Republic of the Congo ( DRC ) and Sudan (now South Sudan).

What country did the flu come from?

The first “modern” flu pandemic occurred in 1889 in Russia, and its sometimes known as the “Russian flu.” It reached the American continent just 70 days after it began and ultimately affected approximately 40 percent of the world’s population.

Does the flu spread globally?

CDC programs protect the United States from seasonal influenza, as well as pandemic influenza which occurs when a new flu virus emerges that can infect people and spread globally. Flu viruses change constantly, from season to season and sometimes during the season.

Why does the flu come from Southeast Asia?

The source of the annual flu epidemic has long been a mystery. Now the biggest analysis of flu strains ever has shown it comes from eastern and southeast Asia, a product of the connectedness of people and the patchiness of the region’s rainy seasons.

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