In addition to two already confirmed cases of Legionnaires’ disease from guests staying at the Hilton Grand Vacations in Waikiki, the Hawaii Department of Health is now investigating an additional case. The guest was diagnosed with Legionnaires’ disease on April 2. They stayed at the Grand Islander from March 18 to 25. The first case was diagnosed in June 2021 and the second case on March 6 or 7, 2022. Water samples collected in March indicated a potential for legionella growth within the building’s potable water system. Most healthy people exposed to the bacteria do not develop Legionnaires’ disease. However,…