Royal Caribbean Cruises .(US:RCL) 第一财经·2025-10-03 12:22Core Viewpoint - The outbreak of norovirus on the Royal Caribbean cruise ship "Symphony of the Seas" has raised global concerns about infectious disease control during travel, particularly in enclosed spaces like cruise ships [3][4]. Group 1: Outbreak Details - Approximately 5% of the nearly 2000 passengers on the cruise ship exhibited symptoms of norovirus, such as diarrhea and vomiting [3]. - Experts suggest that the actual number of infections may be higher due to passengers potentially hiding symptoms to avoid quarantine [3]. - The ship has docked at Miami port following the outbreak [3]. Group 2: Norovirus Characteristics - Norovirus is highly contagious and can survive in environments ranging from 0°C to 60°C, making it a year-round threat, especially during the fall and winter seasons [3]. - Transmission can occur through contaminated food or direct person-to-person contact [3]. Group 3: Preventive Measures and Response - Cruise companies are expected to implement emergency response procedures, including enhanced sanitation, isolation of sick passengers and crew, and reducing crowding by closing pools and dining areas [4]. - There is currently no vaccine or specific antiviral treatment for norovirus, but the illness is usually self-limiting, lasting one to three days for most healthy adults [4]. - High-risk groups, such as young children, the elderly, pregnant women, and immunocompromised individuals, require timely medical attention to prevent severe complications like dehydration [4].