Types of Influenza (public)
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"Type" of flu"Variant" of fluaka (where applicable)Host of originDescriptionHuman mortality rate (%)Can infecthumanspoultrypigshorsesdogscatssealswhalesmink / ferretsbatIncubation period, daysSymptoms
(only those outside of the norm - see background)
Fatality & other medic notesSourcesLinks
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AH1pigs, humans, whalesyyEating Animals, Jonathon Safran Foerhttps://docs.google.com/document/d/1m2KjUzyxvtqh52sPQw-ofQeovuxhdi0CBVWE7sg6dzM/edit
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AH1N1Swine flu pigs: 'Spanish flu' 1918
: 2009-10 pandemic - strain of swine flu was a slightly different variety of flu (combo of swine, avian and human genes) so little/no resistance to it in humans & able to spread quickly
28%pigs, humansyy7Similar to the symptoms of regular human seasonal influenza. c: 'Spanish flu' epidemic (1918) estimated to have caused 20 million deaths worldwide
: 15,921 human deaths, worldwide 2009-10
: 21,285 cases detected, worldwide 2012

: 2114 cases in California, 2009
: 596 deaths in California, 2009

: virus can live on hard surfaces for up to 24 hours, and soft surfaces for 20 minutes.
NIH; HPA; BBC Health; Vaccine; CDC; Guardianhttp://www.niaid.nih.gov/topics/Flu/H1N1/GeneralInfo/Pages/background.aspxhttp://www.hpa.org.uk/Topics/InfectiousDiseases/InfectionsAZ/InfluenzaInAnimals/http://www.bbc.co.uk/health/physical_health/conditions/swineflumulti1.shtmlhttp://download.thelancet.com/flatcontentassets/H1N1-flu/epidemiology/epidemiology-20.pdfhttp://www.cdc.gov/flu/swineflu/keyfacts-variant.htmhttp://www.guardian.co.uk/world/2009/jul/03/swine-flu-symptoms-facts
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AH1N2Swine flupigs: 3 human infections detected in Minnesota, 2012, through contact with pigs0%pigs, humans (rare)yy7Similar to the symptoms of regular human seasonal influenza. Some people have also reported runny nose, sore throat, eye irritation, nausea, vomiting and diarrhea.: no human deaths reportedHPA; CDC; Health Map; CDChttp://www.hpa.org.uk/Topics/InfectiousDiseases/InfectionsAZ/InfluenzaInAnimals/http://wwwnc.cdc.gov/eid/article/9/3/pdfs/02-0404.pdfhttp://healthmap.org/news/second-case-h1n2-ever-recorded-humanshttp://www.cdc.gov/h1n1flu/estimates_2009_h1n1.htmhttp://www.cdc.gov/flu/swineflu/keyfacts-variant.htm
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AH1N3Bird fluwild aquatic birds: originates in aquatic birds but can cause localized outbreaks (rather than permanent lineages) in other animalsno dataminke whalesy--: virus found in minke whales caught in South Pacific, 1975-6WHO; CRC Handbook of Marine Mammal Medicine: Health, Disease, and Rehabilitationhttp://www.who.int/vaccine_research/diseases/influenza/WHO_manual_on_animal-diagnosis_and_surveillance_2002_5.pdfhttp://books.google.co.uk/books?id=FIIgDk9i_GkC&pg=PA298&lpg=PA298&dq=H1N3+whale+influenza&source=bl&ots=axfQZee9wV&sig=yn36SsQw0cQB1H1pqOxguGGvxNg&hl=en&sa=X&ei=8PA5UaXzNLSe7AaajIH4CQ&ved=0CC8Q6AEwAA#v=onepage&q=H1N3%20whale%20influenza&f=false
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AH2humansyEating Animals, Jonathon Safran Foerhttps://docs.google.com/document/d/1m2KjUzyxvtqh52sPQw-ofQeovuxhdi0CBVWE7sg6dzM/edit
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AH2N2Asian fluwild aquatic birds: caused the Asian pandemic of 1957 and then disappeared from the human population 10 years later
: however continues to circulate in the avian reservoir and are coming into closer proximity to susceptible human populations
no databirds, potentially humans (again)y--: killed between 1 & 2 million people, 1957 pandemic
: ~70,000 deaths US, 1957 pandemic
: has not circulated in humans since 1968, so no one under 30 years old has immunity to this strain
NCBIhttp://www.ncbi.nlm.nih.gov/pubmed/7684877http://www.britannica.com/EBchecked/topic/1663331/Asian-flu-of-1957#ref1119847
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AH3pigs, humans, horses, seals, dogsyyyyyEating Animals, Jonathon Safran Foerhttps://docs.google.com/document/d/1m2KjUzyxvtqh52sPQw-ofQeovuxhdi0CBVWE7sg6dzM/edit
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AH3N2Swine flupigs: virus responsible for the 1968/9 pandemic in Hong Kong
: virus first identified in pigs in 2010 and in people in 2011
: human infections were mostly associated with prolonged exposure to pigs at agricultural fairs
: limited human-to-human spread of this virus has been detected
6%humans, pigsyy7Similar to the symptoms of regular human seasonal influenza. Some people have also reported runny nose, sore throat, eye irritation, nausea, vomiting and diarrhea.: caused roughly 34,000 deaths in the United States during the 1968-69 season
: still circulating
: 309 human cases in US, 2012
: of 16 hospitalizations in US since July 2012, only 1 death
CDC; HPA; CDChttp://www.cdc.gov/flu/swineflu/h3n2v-cases.htmhttp://www.hpa.org.uk/Topics/InfectiousDiseases/InfectionsAZ/InfluenzaInAnimals/http://www.cdc.gov/flu/swineflu/h3n2v-case-count.htmhttp://www.cdc.gov/flu/swineflu/h3n2v-case-count.htmhttp://www.cdc.gov/flu/swineflu/keyfacts-variant.htm
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AH3N3Bird fluwild aquatic birds: originates in aquatic birds but can cause localized outbreaks (rather than permanent lineages) in other animalsno datasealsy--no dataWHOhttp://www.who.int/vaccine_research/diseases/influenza/WHO_manual_on_animal-diagnosis_and_surveillance_2002_5.pdf
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AH3N8Equine influenza / equine 2wild aquatic birds: H3N8 equine influenza virus has been known to exist in horses for more than 40 years
: In 2004 was found for the first time in dogs (initially greyhounds)
: 2011 outbreaks in France, Germany, Ireland, UK & USA
no datahorses, dogs, sealsyyy1 - 3-: 36% mortality rate in US dogs (8 of 22 died) during initial outbreak in 2004, but in 2010 dropped to max. 5%CDC; Science Daily; OIE; VetMed; St David's Equine Factsheethttp://www.cdc.gov/flu/canine/#canine-influenzahttp://www.sciencedaily.com/releases/2012/07/120731094745.htmhttp://www.oie.int/our-scientific-expertise/specific-information-and-recommendations/equine-influenza/http://www.vetmed.wsu.edu/depts_waddl/dx/K9Influenza.aspxhttp://www.stdavids-equine.co.uk/pdfs/equine_influenza.pdf
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AH4y
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AH4N5Bird fluwild aquatic birds: originates in aquatic birds but can cause localized outbreaks (rather than permanent lineages) in other animalsno datasealsy--: found in harbour seals off New England coast in 1982-3WHOhttp://www.who.int/vaccine_research/diseases/influenza/WHO_manual_on_animal-diagnosis_and_surveillance_2002_5.pdf
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AH4N6Bird fluwild aquatic birds: originates in aquatic birds but can cause localized outbreaks (rather than permanent lineages) in other animalsno datasealsy--no dataWHOhttp://www.who.int/vaccine_research/diseases/influenza/WHO_manual_on_animal-diagnosis_and_surveillance_2002_5.pdf
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AH5poultryyyyyy
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AH5N1Bird flu (variant most commonly referred to)wild aquatic birds: wild birds > poultry > people
: virus first shown to have passed from birds to humans in 1997, during an outbreak of avian flu among poultry in Hong Kong
: outbreaks have occurred intermittently since then, particularly in Asia where the disease is now considered to be endemic

: no definite reports of it passing from person to person, although there is a concern that the H5N1 strain may undergo genetic changes that could result in it spreading more easily from person to person
: & there was a first possible case of human-to-human transmission reported in Thailand in September 2004
: while the wild birds do not seem to be affected by the virus, the livestock that contract the virus get very sick & any animals that eat infected livestock risk contracting virus

: in Feb/March 2004, the virus was detected in a clouded leopard and white tiger in a zoo near Bangkok; both died
60%poultry, pigs, humans (but not easily), dogs, cats, tigers & leopardsy, but not easilyyyyyy7Similar to common flu, but in many cases can also cause rapid deterioration, pneumonia (inflammation of the tissue of one or both lungs) and multiple organ failure, all of which can be fatal.: 90% bird mortality rate

Does not spread easily to humans and there have been no reports of it passing from person to person, but there have been...
: 622 human cases worldwide since 2003
: 371 human deaths worldwide since 2003 (predominantly in Indonesia)
Web MD; NIH; WHO; CDC; NEJM; Science Daily; Science Mag; CDC; BBC Health; CHP; NHS Choiceshttp://www.webmd.com/cold-and-flu/flu-guide/advanced-reading-types-of-flu-viruses?page=2http://www.niaid.nih.gov/topics/flu/understandingflu/pages/definitionsoverview.aspxhttp://www.who.int/influenza/human_animal_interface/avian_influenza/h5n1_research/faqs/en/index.htmlhttp://wwwnc.cdc.gov/eid/article/13/4/06-0736_article.htmhttp://www.nejm.org/doi/full/10.1056/NEJMra052211http://www.sciencedaily.com/releases/2012/12/121219174158.htmhttp://www.sciencemag.org/content/336/6088/1534.fullhttp://www.cdc.gov/flu/avian/gen-info/qa.htm#4http://www.bbc.co.uk/health/physical_health/conditions/birdflu1.shtmlhttp://www.chp.gov.hk/files/pdf/global_statistics_avian_influenza_e.pdfhttp://www.nhs.uk/conditions/Avian-flu/Pages/Introduction.aspxhttp://www.nhs.uk/Conditions/Avian-flu/Pages/Symptoms.aspxhttp://wwwnc.cdc.gov/eid/article/14/11/08-0509_article.htm
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AH5N2, 3 & 9Bird fluwild aquatic birds: detected in birds in Quebec and British Columbia in 2005no databirds--: not detected in humans
Recombinonics; Tapei Timeshttp://www.recombinomics.com/News/11190504/H5_LPAI_Quebec_British_Columbia.htmlhttp://www.taipeitimes.com/News/taiwan/archives/2012/03/10/2003527445
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AH6wild aquatic birds: H6 viruses are prevalent in bird population in Asia as well as birds in North America and Asiamice & ferretsyJournal of Virologyhttp://jvi.asm.org/content/82/21/10854.full
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AH7horses, poultryyyyyEating Animals, Jonathon Safran Foer; CDChttps://docs.google.com/document/d/1m2KjUzyxvtqh52sPQw-ofQeovuxhdi0CBVWE7sg6dzM/edithttp://wwwnc.cdc.gov/eid/article/10/12/04-0961_article.htm
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AH7N3Bird fluwild aquatic birds: In 2004, an outbreak of highly pathogenic avian influenza H7N3 occurred in poultry in British Columbia, Canada - 2 poultry workers became ill
: In 2012 3 outbreaks amongst poultry in Mexico
0%poultry, humans (rare)yy-: conjunctivitis : For poultry in Mexico, 2012:
- 24.6% incidence rate
- 9.6% mortality rate
FAO; NIAIDhttp://www.fao.org/docrep/016/an395e/an395e.pdfhttp://www.niaid.nih.gov/topics/flu/research/pandemic/pages/timelinehumanpandemics.aspx
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AH7N7Equine influenza / equine 1unknown, but suspected wild birds: originates in aquatic birds but can cause localized outbreaks (rather than permanent lineages) in other animals
: first reported case in humans in 2003
: Amongst horses, the influenza is so contagious that there is a near 100% infection rate in unvaccinated horses
1%horses, seals (particularly deadly), humans (rare)yyy1 - 3: conjunctivitis
: in uncomplicated cases, the horse will usually fully recover within two to three weeks, but more complicated cases can lead to permanent lung damage.
: found in harbour seals off New England coast in 1980
: in 2003 89 people in the Netherlands (mostly poultry workers) became ill with eye infections or flu-like symptoms; a vet who visited one of the affected poultry farms died
WHO; St David's Equine Factsheet; Horse & Houndhttp://www.who.int/vaccine_research/diseases/influenza/WHO_manual_on_animal-diagnosis_and_surveillance_2002_5.pdfhttp://www.stdavids-equine.co.uk/pdfs/equine_influenza.pdfhttp://www.horseandhound.co.uk/horsecare/1370/86005.html
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AH7N9unknownunknown: March 2013 - infected 3 people in China, killing 1
: March 10, residents of China's powerhouse metropolis, Shanghai, noticed some dead pigs floating among garbage flotsam in the city's Huangpu River.
: One very plausible explanation for this chain of Chinese events is that the H7N9 virus has undergone a mutation -- perhaps among spring migrating birds around Lake Qinghai. The mutation rendered the virus lethal for domestic ducks and swans. Because many Chinese farmers raise both pigs and ducks, the animals can share water supplies and be in fighting proximity over food -- the spread of flu from ducks to pigs, transforming avian flu into swine flu, has occurred many times. Once influenza adapts to pig cells, it is often possible for the virus to take human-transmissible form. That's precisely what happened in 2009 with the H1N1 swine flu, which spread around the world in a massive, but thankfully not terribly virulent, pandemic.
-pigs, ducks, swans, humans (if connected - as yet unknown)yyy---Foreign Policyhttp://www.foreignpolicy.com/articles/2013/04/01/is_this_a_pandemic_being_born_china_pigs_virus?page=0,0
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AH8-17
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AH9N2Bird fluwild aquatic birds: aquatic birds (before 1988) > land-based poultry (1988+) > pigs (1998+) > humans (1999+)
: endemic in domestic poultry in Eurasia
: 3 human cases reported in Hong Kong
0%humans (rare), poultry, pigsyyy--: no human deaths reported
: only 3 human cases reported
1) 2 in1999, both infants in Hong Kong, both probably poultry-related
2) 1 in 2003, child in Hong Kong
WHO; Science Daily; CDC; NIAIDhttp://www.who.int/vaccine_research/diseases/influenza/WHO_manual_on_animal-diagnosis_and_surveillance_2002_5.pdfhttp://www.sciencedaily.com/releases/2008/08/080812213818.htmhttp://www.cdc.gov/onehealth/pdf/castelbrando/daniel_perez.pdfhttp://www.niaid.nih.gov/topics/flu/research/pandemic/pages/timelinehumanpandemics.aspx
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AH10N7Bird fluwild aquatic birds: originates in aquatic birds but can cause localized outbreaks (rather than permanent lineages) in other animals
: 2 one-year-old infants from Ismaillia contracted the virus in 2004 & recovered after presenting a fever and cough
0%mink, humans (rare), poultryyyy--: no human deaths reportedWHOhttp://www.who.int/vaccine_research/diseases/influenza/WHO_manual_on_animal-diagnosis_and_surveillance_2002_5.pdf
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AH13N2 & 9Bird fluwild aquatic birds, esp. gulls: originates in aquatic birds but can cause localized outbreaks (rather than permanent lineages) in other animalsno datapilot whalesy--: both strains found in pilot whale in 1984WHO; CRC Handbook of Marine Mammal Medicine: Health, Disease, and Rehabilitationhttp://www.who.int/vaccine_research/diseases/influenza/WHO_manual_on_animal-diagnosis_and_surveillance_2002_5.pdfhttp://books.google.co.uk/books?id=FIIgDk9i_GkC&pg=PA298&lpg=PA298&dq=H1N3+whale+influenza&source=bl&ots=axfQZee9wV&sig=yn36SsQw0cQB1H1pqOxguGGvxNg&hl=en&sa=X&ei=8PA5UaXzNLSe7AaajIH4CQ&ved=0CC8Q6AEwAA#v=onepage&q=H1N3%20whale%20influenza&f=false
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AH17Bat flubats: discovered in bats in 2012 - new b/c originates in bats (winged mammals, as opposed to winged birds)
: scientists have not been able to grow the new bat virus in chicken eggs or human cells which suggests that the immediate risk of infection to humans is small
no datafruit batsy--: no deaths detected in bats & as yet not deemed to pose a threat to human healthNHS Choices; CDChttp://www.nhs.uk/news/2012/03march/Pages/cdc-finds-h17-bat-influenza.aspxhttp://www.cdc.gov/flu/about/viruses/bat-flu.htm
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AH8no datano datano datano datano data--no data
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AH11no datano datano datano datano data--no data
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AH12no datano datano datano datano data--no data
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AH14no datano datano datano datano data--no data
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AH15no datano datano datano datano data--no data
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AH16no datano datano datano datano data--no data
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B-mild feverbirds not capable of carrying: 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
-humans & sealsyy2-would only cause death amongst those at high risk (e.g. elderly, overweight)Web MD; Harvard Nieman Guide; CDChttp://www.webmd.com/cold-and-flu/flu-guide/advanced-reading-types-of-flu-viruseshttp://nieman.harvard.edu/Microsites/NiemanGuideToCoveringPandemicFlu/TheScience/CrossingTheSpeciesBarrier.aspx#animalhttp://www.cdc.gov/flu/professionals/acip/clinical.htm
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C-common flubirds not capable of carrying: much less severe than types A & B-humans; rarely pigs & dogsyyy3.5--Web MD; Harvard Nieman Guidehttp://www.webmd.com/cold-and-flu/flu-guide/advanced-reading-types-of-flu-viruseshttp://nieman.harvard.edu/Microsites/NiemanGuideToCoveringPandemicFlu/TheScience/CrossingTheSpeciesBarrier.aspx#animalhttp://www.webmd.com/cold-and-flu/news/20031205/raise-your-flu-iq
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