The long-anticipated fall outbreak of swine flu has begun in Minnesota, with clusters of new cases cropping up at schools and universities, health officials said Monday.
Speaking at a flu pandemic summit that drew more than 600 people, State Epidemiologist Ruth Lynfield said, "We're now experiencing our second wave."
At the same time, Michael Osterholm, a University of Minnesota expert, predicted that the number of cases will peak in the next six to eight weeks, sending absenteeism rates soaring from schools to businesses.
"The bottom line is, it's here," Osterholm told the audience of health, business and government officials gathered in Brooklyn Center. He noted that "none of us can tell you, 12 hours from now, what this virus is going to do." He said he won't be surprised if major sporting events are canceled in the next few months because teams have too many players fighting the flu.
"This train has left the station," he said. "It's moving and gaining steam."
Osterholm also warned that cases of the novel flu strain could peak before enough vaccine arrives, possibly in October.
"I'm afraid too little vaccine is going to get here before the peak hits," said Osterholm, director of the university's Center for Infectious Disease Research and Policy.
Experts have predicted for months that the flu pandemic, which hit Minnesota in April and faded over the summer, would get a second wind once school started.