Just Googled as I thought your question was asking if it was the same strain. Here's what I found:
Link 1: "In 1918, the cause of human influenza and its links to avian and swine influenza were unknown" - research denoted these as H1N1 viruses.
"With the appearance of a new H2N2 pandemic strain in 1957 ("Asian flu"), the direct H1N1 viral descendants of the 1918 pandemic strain disappeared from human circulation entirely, although the related lineage persisted enzootically in pigs. But in 1977, human H1N1 viruses suddenly "reemerged" from a laboratory freezer (9). They continue to circulate endemically and epidemically."
From WHO: "Swine influenza viruses are most commonly of the H1N1 subtype, but other subtypes are also circulating in pigs (e.g., H1N2, H3N1, H3N2)." 2009 Chairman Statement: "The Committee considered available data on confirmed outbreaks of A/H1N1 swine influenza in the United States of America, Mexico, and Canada."
From this, I believe that it is indeed a variant of the 1918 strain.
Hope this helps.
Alison
Links:
http://www.cdc.gov/ncidod/eid/vol12no01/05-0979.htm
http://www.who.int/en/
No comments:
Post a Comment