measles

It's unclear what will happen when the vessel arrives at its home port on the island. The ship was quarantined by St. Lucia after a crew member was confirmed to have the highly contagious disease.

The quarantined ship is reportedly owned and operated by the Church of Scientology. Some 300 passengers and crew members are aboard.

The U.S. is in the midst of a record-breaking measles epidemic. What brought us here, who is most at risk and what do you need to know now?

Vaccination eliminated measles from the U.S. nearly 20 years ago. But with this year's record-setting outbreak, are we close to measles making a sustained comeback?

The University of California, Los Angeles, and California State University have told hundreds of students and staff to stay home for up to 48 hours unless they can prove they're immune or vaccinated.