Hundreds of people gathered at Torch Lake, in the northwest corner of the Lower Peninsula in Michigan, over the July 4 weekend./Credit:	Michigan State Police

Hundreds of people gathered at Torch Lake, in the northwest corner of the Lower Peninsula in Michigan, over the July 4 weekend./Credit: Michigan State Police

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Hundreds of people celebrated the July 4 weekend at a Michigan lake. Now some have Covid-19

After revelers celebrated the Fourth of July at a Michigan lake, some started testing positive for Covid-19 -- prompting health officials to warn other party-goers that they might have been infected, too.