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Swine Flu Virus Not So New, Study Finds
March 25, 2010
The H1N1 swine flu virus may have been new to humanity in many ways but in one key feature its closest relative was the 1918 pandemic virus, researchers reported on Wednesday.
Their findings could point to better ways to design vaccines and help explain why the swine flu pandemic largely spared the elderly.
“This study defines an unexpected similarity between two pandemic-causing strains of influenza,” Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, said in a statement.
Two studies show an important structure called hemagglutinin is very similar in both the swine flu H1N1 and its distant cousin, the H1N1 virus that caused the 1918 pandemic. Hemagglutinin is used by viruses to infect cells and gives influenza viruses the “H” in their designations.
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