Two more probable cases of swine flu were reported in Minnesota on Wednesday, both at Southwest High School in Minneapolis, according to the state Department of Health.
State health officials would not say whether the two patients are students or adults, but noted that the school is remaining open.
"We want to ensure that we're getting the message out that people who are sick stay home. That's really important," said Dr. Ruth Lynfield, the state epidemiologist.
As of Wednesday, Minnesota has only one confirmed case of the new strain of flu, and 11 probable cases, none serious enough to require hospitalization, Lynfield said. "Thus far everyone has been outpatient and expected to make full recovery at home," she said.
Meanwhile, the Mille Lacs Reservation in Onamia announced it had identified a "possible case" of swine flu and will close its schools to students today and Friday while staff disinfects the buildings.
The announcement came as news to the Minnesota Department of Health, which has been overseeing testing for the new flu strain. "We're not aware of any positive [test results] involving somebody from that region," spokesman Buddy Ferguson said.
Jennifer Hellman, a Mille Lacs spokeswoman, said the reservation had done its own testing and concluded that there was a probable case, but later changed it to a possible case. She offered no details about the testing.
She said the reservation had decided to cancel classes at its Nay Ah Shing schools and day-care program for the rest of the week as a precaution, although staff "should report to work as usual."