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  2. Mar 23, 2023 · The H1N1 flu, sometimes called swine flu, is a type of influenza A virus. During the 2009-10 flu season, a new H1N1 virus began causing illness in humans. It was often called swine flu and was a new combination of influenza viruses that infect pigs, birds and humans. The World Health Organization (WHO) declared the H1N1 flu to be a pandemic in ...

  3. Swine flu viruses cause high levels of illness and low death rates in pigs. Swine influenza viruses may circulate among swine throughout the year, but most outbreaks occur during the late fall and winter months similar to outbreaks in humans. The classical swine flu virus (an influenza type A H1N1 virus) was first isolated from a pig in 1930.

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  4. Swine flu (H1N1) is an infection that a type of flu (influenza) virus causes. It’s called swine flu because it’s similar to a flu virus that affects pigs (swine). The virus leads to a lung (respiratory) disease in pigs. Swine flu (H1N1) is a respiratory infection in humans. Cleveland Clinic is a non-profit academic medical center.

  5. May 16, 2023 · Fever. Sore throat. Stuffy or runny nose. Body aches. Headache. Chills. Fatigue. Like the regular flu, swine flu can lead to more serious problems including pneumonia, a lung infection, and other ...

  6. Mar 8, 2019 · Swine flu made headlines in 2009 when it was first discovered in humans and became a pandemic. Pandemics are contagious diseases affecting people throughout the world or on multiple continents at ...

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  7. Aug 5, 2022 · This is thought to have happened in 2009 when a new H1N1 virus with genes of avian, swine and human origin emerged to cause a flu pandemic. Background. In 2005, human infection with a novel flu A virus flu became nationally notifiable in the United States. Novel flu A viruses are different from current seasonal viruses circulating in people and ...

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