| http://www.w3.org/ns/prov#value | - What is different this year, he said, is that the most common strain of the flu is H1N1, which became known in 2009 as the swine flu.The strain is now so common in the United States it was included in this year???s flu vaccination.The H1N1 virus makes young adults among the most susceptible to the flu, Iser said.
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