Quick Answer: What Was The Worst Flu Pandemic?

What animal did the Spanish flu come from?

The 1918 influenza pandemic caused an estimated 50 million to 100 million deaths worldwide.

The virus that caused the 1918 influenza pandemic probably sprang from North American domestic and wild birds, not from the mixing of human and swine viruses..

What is the deadliest disease in history?

Cholera, bubonic plague, smallpox, and influenza are some of the most brutal killers in human history. And outbreaks of these diseases across international borders, are properly defined as pandemic, especially smallpox, which throughout history, has killed between 300-500 million people in its 12,000 year existence.

What was the deadliest pandemic in history?

The 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). Current pandemics include COVID-19 and HIV/AIDS.

How long did the 1918 flu last?

While the global pandemic lasted for two years, a significant number of deaths were packed into three especially cruel months in the fall of 1918.

How long would a flu pandemic last?

A pandemic is not a “one time” event and periods of illnesses may come in 2 or 3 “waves” anywhere from 3 to 12 months apart. The total duration of a pandemic is likely to be 12 to 18 months.

How often does a pandemic occur?

However, because influenza pandemics occur on average once every 25–30 years, the average annual pneumonia and influenza mortality from influenza pandemics is a little more than 230,000 deaths. This is comparable to seasonal influenza, which worldwide causes at least 250,000 deaths annually (WHO 2016b).

What was the mortality rate of the 1918 flu?

An estimated one third of the world’s population (or ≈500 million persons) were infected and had clinically apparent illnesses (1,2) during the 1918–1919 influenza pandemic. The disease was exceptionally severe. Case-fatality rates were >2.5%, compared to <0.1% in other influenza pandemics (3,4).

Is the Spanish flu still around today?

Descendants of the 1918 influenza virus still circulate today, and current seasonal influenza vaccines provide some protection against the 1918 virus.

Which influenza pandemic has the most severe impact?

HOW DID INFLUENZA BEHAVE IN THE PAST?The Spanish influenza (1918–1919) The Spanish influenza pandemic, which stands as the single most fatal event in human history, killed an estimated 50 million people or more globally. … The Asian influenza (1957–1958) … The Hong Kong influenza (1968–1969) … The 2009 swine-origin influenza.

What was the last pandemic in the USA?

2009: H1N1 flu In the spring of 2009, the H1N1 virus was detected in the United States and spread quickly across the country and the world. This outbreak made headlines as the swine flu. The CDC estimates that there were 60.8 million cases, 274,304 hospitalizations, and 12,469 deaths in the United States.

Why is flu not a pandemic?

Pandemic flu is different and can be much worse. It can cause a worldwide outbreak of a new form of flu virus, which spreads easily from person to person because they have no immunity. Pandemic flu occurs when a flu virus goes through changes (called “mutations”) that create a new virus the body has never encountered.

What made the 1918 flu so deadly?

Scientists offer several possible explanations for the high mortality rate of the 1918 influenza pandemic. Some analyses have shown the virus to be particularly deadly because it triggers a cytokine storm, which ravages the stronger immune system of young adults.

When was the last major flu epidemic?

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.

What do you do in the case of a pandemic?

During a Pandemic Avoid close contact with people who are sick. When you are sick, keep your distance from others to protect them from getting sick too. Cover your mouth and nose with a tissue when coughing or sneezing.

What American city was one of the hardest hit by the 1918 flu?

PhiladelphiaPhiladelphia was the hardest-hit city in the United States. After the Liberty Loan parade (celebrations to promote government bonds that helped pay for the Allied cause in Europe) on September 28, thousands of people became infected.

When did the Black Death End?

1346 – 1353Black Death/Periods