The Oakland County Health Division said the county has had 18 confirmed cases of Legionnaires' disease in 2018. Officials said all 18 cases have sought treatment and have either fully recovered or are currently recovering. There have been no reported deaths. According to the Michigan Department of Health and Human Services, there have been 135 confirmed cases of legionellosis reported in 33 counties in 2018, compared to 107 confirmed cases during the same timeframe last year.