Two children have been infected by new types of swine flu. Unlike flu viruses in the past that have jumped from pigs to humans, these have a gene from the pandemic 2009 H1N1 (swine) flu. The CDC is continuing to investigate, but so far no other cases have been reported.
The infections occurred in children under five. The first case occurred in late July when an Indiana boy with multiple chronic conditions had fever, cough, shortness of breath, diarrhea, and sore throat. He was briefly hospitalized but has since recovered. While he reported no contact with pigs, a household caretaker did.
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"Swine-Origin Influenza A (H3N2) Virus Infection in Two Children --- Indiana and Pennsylvania, July--August 2011" -CDC (http://www.cdc.gov/mmwr/preview/mmwrhtml/mm60e0902a1.htm?s_cid=mm60e0902a1_w)