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Paradigm Shift Intervention Monitoring
Match 2011 Human H3N2v
Like the two earlier matches from New York and Iowa (A/swine/NY/A01104005/2011 and A/swine/Iowa/A01202640/2011), the collections were after the spread of H3N2v in humans in 2011 and all matches are with the first 10 human isolates in 2011. Thus, there still have been no swine matches with the three most recent H3N2v human isolates (A/West Virginia/06/2011, A/West Virginia/07/2011, A/Utah/10/2012) which have an N2 from swine H3N2v.
The recent swine matches indicate this constellation is spreading in swine in Illinois, and increase concerns that these sequences have adapted to humans, and like H1N1pdm09, have jumped back to swine and are becoming increasingly common.