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Known About The Epidemiology Of Swine Flu

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2009 H1N1 Pandemic (H1N1pdm09 virus) Pandemic Influenza ...
    Jun 11, 2019 · The (H1N1)pdm09 virus was very different from H1N1 viruses that were circulating at the time of the pandemic. Few young people had any existing immunity (as detected by antibody response) to the (H1N1)pdm09 virus, but nearly one-third of people over 60 years old had antibodies against this virus, likely from exposure to an older H1N1 virus earlier in their lives.

WHO Weekly Epidemiological Record on pandemic (H1N1) 2009
    Weekly Epidemiological Record on pandemic (H1N1) 2009. These issues of the weekly record include key information on pandemic influenza, along with other timely public health information. 5 February 2010, vol. 85, 6 (pp 37–48) Update on oseltamivir-resistant pandemic A (H1N1) 2009 influenza …

The epidemiology of influenza
    Abstract. Although unpredictable, influenza outbreaks are known to occur in three patterns: pandemics every 30 to 40 years, with high excess mortality; epidemics much more frequently, with lower excess mortality; and usually mild sporadic outbreaks. The possibility of a swine-flu pandemic this winter, resembling that of 1918-20, is the result of a unique deviation in the epidemiology of this fascinating …Cited by: 15

Swine Influenza Viruses: An Asian Perspective
    Pandemic influenza viruses emerging after the 1918 Spanish flu have originated in asia. Although distinct lineages of North American and European SIVs of the H1N1, H3N2, and HiN2 subtypes have been widely studied, less is known about the porcine viruses that are circulating among pig …Cited by: 22

1918 Influenza: the Mother of All Pandemics - Volume 12 ...
    That question did not begin to be resolved until the 1930s, when closely related influenza viruses (now known to be H1N1 viruses) were isolated, first from pigs and shortly thereafter from humans. Seroepidemiologic studies soon linked both of these viruses to the 1918 pandemic . Subsequent research indicates that descendants of the 1918 virus still persists enzootically in pigs.

Influenza (Flu) – Epidemiology
    Although swine flu viruses do not normally infect humans, a small number of swine flu virus infections occur in humans each year. Most human cases of swine flu infections have occurred in people who have had contact with swine on farms or at fairs or other livestock shows. Additional information on swine flu is available at

Background and Epidemiology - Centers for Disease Control ...
    Sep 10, 2019 · In April 2009, a novel influenza A (H1N1) virus caused the most recent worldwide pandemic. This virus was antigenically distinct from human influenza A (H1N1) viruses in circulation from 1977 through spring 2009 (6, 7). Each season, viruses belonging to influenza A subtypes A (H1N1) and A (H3N2) and to both B lineages co-circulate (1, 2).

FluView Summary ending on March 27, 2021 CDC
    This person was infected with an influenza A(H1N1) variant (A(H1N1)v) virus in 2020. The patient is an adult > 18 years of age, was not hospitalized, and has recovered from their illness. An investigation into the source of the infection revealed that the patient worked with and had daily contact with swine.

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