There have been 145 cases of infection with the H3N2 variant swine flu since July 12 -- a significant jump from the prior week's 12 confirmed cases, officials at the U.S. Centers for Disease Control reported Thursday morning.
"We're seeing a big increase, and we think it's a real increase," said CDC flu epidemiology chief Dr. Joseph Bresee, during a news conference.
People have been catching this new swine flu primarily from exposures to infected pigs at state and county agricultural fairs. Sneezes and coughs from sick animals in fairground pens can sicken nearby people, who typically come down with a mild illness not unlike the seasonal flu. Two people have been hospitalized with complications from their illness, but both are now home, Bresee said. No one has died from H3N2v infections in 2011 or 2012, he added.
Bresee said the increase in confirmed cases was mostly a result of it being fair season around the country -- which brings more people in contact with infected animals. The spike in cases also results from a new reporting system, which allows states to confirm cases independently of the CDC.