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Paradigm Shift Intervention Monitoring
Cases Increase to 19
The above comments from the Wisconsin Department of Human Services increase the total number of H3N2v beyond the number of confirmed and suspect cases reported previously. These initial cases were linked to four fairs, including the linkage of the first two cases to the Wisconsin State. However, one of the cases was an employee who reported no swine contact. The fair ended August 12 and the CDC has now released three sets of sequences, A/Wisconsin/22/2012 collected August 13, A/Wisconsin/23/2012 collected August 15, and A/Wisconsin/27/2012 collected August 17. The collection date of the third case is outside of the typical incubation period of 2-4 days.
However, all three HA sequences from these cases are identical, signaling clonal expansion suggesting human to human transmission. More information on swine exposure for he August 17 cases would be useful.