The US Centers of Disease Control and Prevention (CDC) has confirmed yet another norovirus outbreak on board a cruise ship, bringing the total number of such outbreaks to 21 this year.

The latest outbreak was reported aboard the AIDAdiva cruise ship, operated by Aida Cruises.

The outbreak on board the AIDAdiva is the latest to have been reported to the CDC, with the last such outbreak taking place on board Oceania Cruises vessel Oceania Insignia in October.

Norovirus infection: Risk factors, symptoms

Also known as the Norwalk virus, norovirus is the most common cause of gastroenteritis and is sometimes also referred to as the winter vomiting disease.

Norovirus transmission typically takes place by the fecal-oral route, and could take place through contaminated food, water or even pers

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