CNN) The U.S. Centers for Disease Control 

 Prevention and the Florida Department of Health are investigating

one of the worst outbreaks of meningococcal disease in gays 

bisexuals in U.S. history," the CDC said on Wednesday.

The CDC said on Thursday that there were 26 cases and seven deaths from 

meningococcal disease in Florida during the investigation.

There were 24 cases and six deaths among men who had sex with men.

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