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Now that summer is over and temperatures are dipping across the Midwest, people are headed indoors, some experts fear the already striking rise in cases is the beginning of another wave of COVID-19. “I think that as fall moves forward ... what we're seeing right now is kind of a preview of what we can expect, as we even see colder temperatures come,” says Brian Dixon, director of public health informatics at the Indianapolis-based Regenstrief Institute.