Ohio and Michigan report H3N2v ‘swine flu’ infections linked to pigs at fairs

Four human infections with influenza viruses that normally circulate in swine (swine influenza) were reported by CDC this week. When swine influenza viruses are detected in people they are called "variant" viruses and are designated with a letter v at the end of the virus subtype. The four human infections were caused by H3N2v viruses ["]