Authorities worry people aboard the ship might have been exposed after a female crew member was diagnosed with measles after coming back from Europe.
There are about 300 crew members and passengers on board, Albert Elens, managing director of Maduro Shipping, the Freewinds' agent in Curacao, told ABC News earlier this week.
A total of 318 passengers and crew are believed to be aboard the ship, a Panamanian-flagged cruise liner identified by maritime-tracking records as SMV Freewinds, the name of the 440-foot ship owned and operated by the Church of Scientology.
The church of Scientology's vessel "Freewinds" is a handsome oceanliner, but one woman says it's more like a slave ship.More news: Airbus sees Bombardier's Belfast plant as 'key supplier'
"When the ship is docked, you have to go via the gangway to get off the ship and there's a big security guard there, which will stop you from getting off if you're not allowed to get off", she said.
Health inspectors reportedly boarded a cruise ship in Curaçao Saturday to investigate a case of the measles. According to the church's website, the ship is a religious retreat for Scientology members. Health officials did not immediately respond to a request for comment.
Three-quarters of those who caught the disease are children or teenagers. "But because it curtails civil liberties, most public health officials are very wary to utilize it". "But because it curtails civil liberties, most public health officials are very wary to utilize it".
Health authorities placed the ship under quarantine after its arrival there on April 30, barring anyone from disembarking.More news: Game 4 Islanders At Hurricanes: Pull Out The Brooms! Canes Sweep Islanders!
"Sometimes people feel like they're being treated like a criminal", Katz added.
Measles is a highly contagious disease caused by a virus that can spread through the air when an infected person coughs or sneezes or if someone comes into direct contact or shares germs by touching the same objects or surfaces. St. Lucia's Ministry of Health and Wellness said on Thursday it had provided 100 doses of measles vaccine to people on the ship.
Symptoms of measles include runny nose, fever and a red-spotted rash.
Measles cases in the United States have surpassed the highest number on record since the disease was declared eliminated nationwide in 2000.More news: No record to suggest that some Sri Lanka bombers visited Kashmir