Health experts outline norovirus risks for cruise passengers
Closed spaces, shared facilities and longer journeys can increase the likelihood of transmission at sea, according to Australian health authorities and researchers.
The Australian Centre for Disease Control says cruise ships are a higher-risk setting for norovirus because passengers mix in enclosed spaces over longer travel periods. Professor Martyn Kirk said outbreaks are common aboard ships, where illness can spread rapidly through shared dining areas, bathrooms, handrails, lift buttons and other communal spaces.
Kirk said the virus passes through contaminated food or water and between infected people. Illness generally lasts 24 to 48 hours, although symptoms can persist longer for some people. He advised travellers to understand the risk without panicking.
Professor Jason Mackenzie estimated that, when an outbreak occurs, about 20 to 30 per cent of those aboard are likely to become infected. Crew members regularly clean and sanitise cabins, restaurants and common areas throughout the day.
Cruise Lines International Association said onboard measures may include isolating individuals on a case-by-case basis when a health professional considers it necessary.