An outbreak is defined by the Centers for Disease Control and Prevention as three or more related cases within a specific geographic areas.

South Carolina is now home to the largest active measles outbreak in the nation, eclipsing Arizona’s tally by adding nearly 100 new cases.

The Cuyahoga County Board of Health said there's also a fourth child in the family now exhibiting respiratory symptoms.

U.S. officials are building a case that ongoing measles outbreaks in South Carolina and other states are unrelated to last year’s major outbreak in Texas, as it tries to retain its status of having eliminated the disease after recording the highest number of confirmed infections in three decades.

Yet another norovirus outbreak has been reported aboard Rotterdam, causing a slight delay to embarkation for extra sanitizing.