article_snippet.sent: Following tests, we have eight confirmed cases of norovirus, also known as winter vomiting disease, which causes gastroenteritis and is highly infectious.
article_snippet.sent: The virus is easily transmitted through contact with infected individuals from one person to another.
article_snippet.sent: We believe the other people who have been ill also had norovirus.
article_snippet.sent: Outbreaks are common in semi-enclosed environments such as hospitals, nursing homes, schools and cruise ships and can also occur in restaurants and hotels.
article_snippet.sent: Earlier this month two cruise ships owned by Royal Caribbean International suffered norovirus outbreaks.
article_snippet.sent: Both docked in San Diego while sailing from Florida, with about 240 passengers on the Legend of the Seas and Celebrity Infinity cruise liners falling ill.
highlights_snippet.sent: Health officials said Health officials have eight confirmed cases of norovirus .