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Paradigm Shift Intervention Monitoring
H3N2v Matches 2011 Human Cases
Although details surrounding the detection of this infection are not know, this recent isolate extends to spread of this sub-clade, which has been frequently detected in swine, including a July 21 collection from Illinois, A/swine/Illinois/A01203672/2012, as well as June isolates from Ohio (A/swine/Ohio/1/2012, A/swine/Ohio/6/2012, A/swine/Ohio/7/2012, A/swine/Ohio/9/2012).
Although this sub-clade is common and widespread in swine, including Ohio and Indiana where most of the recent human H3N2v cases were isolated, none of these swine (or mink) infections have produced a reported human case in 2012.
The most recent human cases with this sub-clade were in the 2011 Iowa cluster (which had no swine exposure) in November. Since that outbreak the CDC has released 60 sets of H3N2v sequences and all 60 matched the sub-clade identified at the West Virginia day care center in November / December. 2011.