Norwegian Cruise Line has closed hot tubs and heated whirlpools on its Norwegian Prima ship as a precautionary measure while it investigates three reported cases of Legionnaires' disease among former passengers. The company confirmed it is working with the Centers for Disease Control and Prevention (CDC) to examine the cases and implement any necessary measures to prevent further incidents.
Three individuals who sailed on the Norwegian Prima in May and July of 2026 were diagnosed with the disease after their voyages. The specific source of exposure has not yet been determined. Norwegian Cruise Line stated that all public hot tubs and private balcony whirlpools will remain closed until water sampling is completed and any required remediation is carried out, adhering to CDC guidelines.
Legionnaires' disease is a severe form of pneumonia caused by Legionella bacteria. Transmission occurs when people inhale small water droplets containing the bacteria, often found in warm water systems such as cooling towers and hot tubs. While the cruise line stated that initial water fixture tests have been negative, testing is ongoing. The company has also notified relevant guests and crew members directly as per CDC guidance and has stated it is elevating sanitation procedures to ensure guest and crew safety.
Legionnaires' disease can pose a higher risk to individuals over 50, current or former smokers, and those with chronic lung conditions or compromised immune systems. Symptoms typically include cough, shortness of breath, fever, muscle aches, and headaches. The disease is treatable with antibiotics.