Strain of Swine Flu - A new swine flu variant infected three children in Iowa, spurring a search for more cases that may signal whether the virus is spreading easily among people. That virus eventually spread globally, sparking the first flu pandemic in 41 years. The S-OtrH3N2 strain contains one gene from the H1N1 pandemic virus and genes from influenza viruses circulating among North American swine, the CDC said today.
The Iowa Department of Public Health said Tuesday that the children had tested positive for the A/H3N2 strain of the influenza virus, which has cropped up in several other
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