According to some news reports, Royal Caribbean has issued a health alert to guests after a case of Legionnaires’ disease was potentially linked to its popular vessel, Symphony of the Seas. The guest sailed during March or April 2025. Although the Centers for Disease Control and Prevention (CDC) has not confirmed the ship as the source of exposure, the company has adopted precautionary measures, citing an “abundance of caution. This is not the first time Symphony of the Seas has been associated with potential cases. In January 2025, Royal Caribbean sent notices to passengers after two other guests were diagnosed following sailings in late 2024. One recurring concern in cruise-related cases is private balcony hot tubs. While these amenities offer luxury and privacy, they may not receive the same rigorous maintenance as public pools and spas. The CDC has identified poorly maintained private hot tubs as a higher risk factor for Legionella growth. The CDC has urged cruise lines to include all hot tubs—public and private—in routine sanitation and safety checks. Royal Caribbean has not specified whether the recent case involved a private hot tub. The cruise line has initiated testing of water systems.