Why Is The Flu Not Considered A Pandemic?

What was the longest pandemic?

The Spanish flu pandemic was the largest, but not the only large recent influenza pandemic.

Two decades before the Spanish flu the Russian flu pandemic (1889-1894) is believed to have killed 1 million people..

Which type of change can result in a severe flu epidemic or pandemic?

Type A viruses undergo both antigenic drift and shift and are the only influenza viruses known to cause pandemics, while influenza type B viruses change only by the more gradual process of antigenic drift.

Who gets the flu most often?

The same CID study found that children are most likely to get sick from flu and that people 65 and older are least likely to get sick from influenza. Median incidence values (or attack rate) by age group were 9.3% for children 0-17 years, 8.8% for adults 18-64 years, and 3.9% for adults 65 years and older.

How long does the 2020 flu last?

Most people who become sick will recover in a few days to less than two weeks, but some people may become more severely ill. Following flu infection, moderate complications such as secondary ear and sinus infections can occur.

Whats the difference between Flu A and Flu B?

Unlike type A flu viruses, type B flu is found only in humans. Type B flu may cause a less severe reaction than type A flu virus, but occasionally, type B flu can still be extremely harmful. Influenza type B viruses are not classified by subtype and do not cause pandemics.

Which plague killed the most?

the Black DeathThe most fatal pandemic in recorded history was the Black Death (also known as The Plague), which killed an estimated 75–200 million people in the 14th century. The term was not used yet but was for later pandemics including the 1918 influenza pandemic (Spanish flu).

How long did the Hong Kong flu last in the US?

Hong Kong Flu, 1968–1969 The first cases in the U.S. were detected as early as September 1968. The number of deaths between September 1968 and March 1969 was 33,800, making it the mildest flu pandemic in the 20th century.

Was the Hong Kong flu considered a pandemic?

The 1968 flu pandemic was a global outbreak of influenza that originated in China in July 1968 and lasted until 1969–70. The outbreak, which is sometimes called the Hong Kong flu of 1968, was the third influenza pandemic of the 20th century.

What was 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.

Is the flu considered a pandemic?

An influenza pandemic is a global outbreak of a new influenza A virus. Pandemics happen when new (novel) influenza A viruses emerge which are able to infect people easily and spread from person to person in an efficient and sustained way. The United States is NOT currently experiencing an influenza pandemic.

What flu is going around 2020?

“Nationally, flu activity has been elevated … and continues to increase; this represents somewhat of an early start to the U.S. flu season,” said Scott Pauley, a press officer for CDC. “Flu activity is currently being caused mostly by influenza B/Victoria viruses, followed by H1N1 viruses and H3N2 viruses.

When was the last pandemic flu?

The most recent pandemic occurred in 2009 and was caused by an influenza A (H1N1) virus. It is estimated to have caused between 100 000 and 400 000 deaths globally in the first year alone.

What happens when a pandemic influenza virus emerges?

What happens when a pandemic influenza virus emerges? When a pandemic influenza virus emerges, the virus can spread quickly because most people will not be immune and a vaccine might not be widely available to offer immediate protection.

What was the first pandemic?

The earliest recorded pandemic happened during the Peloponnesian War. After the disease passed through Libya, Ethiopia and Egypt, it crossed the Athenian walls as the Spartans laid siege. As much as two-thirds of the population died.

Was there a flu pandemic in 1968?

The 1968 pandemic was caused by an influenza A (H3N2) virus comprised of two genes from an avian influenza A virus, including a new H3 hemagglutinin, but also contained the N2 neuraminidase from the 1957 H2N2 virus. It was first noted in the United States in September 1968.

How was the Hong Kong flu transmitted?

In 1997, an H5N1 avian influenza A virus was transmitted directly from chicken to humans in Hong Kong, killing six of the 18 people infected with 33% motality rate. The H5N1 virus in Hong Kong seemed to be rarely transmissible from human to human.

What flu virus is worse A or B?

In the past, it was thought that infection with influenza A was more severe than infection with influenza B. However, a 2015 study in adults with influenza A and influenza B found they both resulted in similar rates of illness and death.

How long did the 1918 flu last?

The Spanish flu, also known as the 1918 flu pandemic, was an unusually deadly influenza pandemic caused by the H1N1 influenza A virus. Lasting from February 1918 to April 1920, it infected 500 million people – about a third of the world’s population at the time – in four successive waves.