A French woman who contracted hantavirus while onboard the MV Hondius cruise ship is now critically ill, and relying on an artificial lung, a doctor treating her says.

The woman, whose identity has not been made public, was a passenger on the MV Hondius cruise ship that left Argentina on April 1 for the Canary Islands. A hantavirus outbreak on the vessel has now led to three deaths and multiple hospitalizations across several countries.

In an update on Tuesday, May 12, a doctor at the Paris hospital where the woman is being treated said she is critically ill and using an artificial lung, per the Associated Press.

On Tuesday, Dr. Xavier Lescure, an infectious disease specialist at Bichat–Claude Bernard Hospital, told the outlet that the woman’s severe complications from hantavirus have led to life-threatening lung and heart problems during “the final stage of supportive care.”

Hantaviruses are mainly spread by rodents and can cause serious illnesses and death in people who are exposed to an infected animal’s urine, droppings, and saliva, according to the Centers for Disease Control.

There is no cure or treatment if an individual becomes infected with hantavirus. However, the CDC recommends supportive care, including rest and hydration.

The World Health Organization (WHO) also shared an update on social media Tuesday stating that there have been 11 total cases reported, including three deaths, while two others are classified as probable.

“All are among passengers or crew on the ship,” the statement said. “We expect more cases given the dynamics of spread on a ship and the virus’ incubation period.”

However, WHO noted that there was no indication that the infections were the start of a “larger outbreak.”

The three people who have died are believed to be a Dutch couple and a German national, NBC News previously reported. Another individual was being treated in an intensive care unit in South Africa.

After leaving Argentina on April 1, the MV Hondius had stops scheduled in Antarctica, the Falkland Islands, South Georgia, Nightingale Island, Tristan, St. Helena, Ascension and Cape Verde. There were 150 people on the ship, The New York Times previously reported.

On May 10, remaining passengers were evacuated in Tenerife, an island in Spain’s Canary Islands.

Since then, those who were onboard the MV Hondius have been transported to multiple countries. Fourteen Spanish passengers were taken to a military hospital in Madrid, where they are mandated to quarantine. Twenty-six people were flown to the Netherlands.

Eight of those passengers were Dutch, who returned home via medical transport and will self-quarantine for six weeks, the Dutch Foreign Ministry said, the Associated Press reported.

One German passenger, one Japanese passenger and 20 British nationals who were transported to Arrowe Park Hospital in Merseyside, England, to quarantine and undergo tests.

Sixteen Americans were sent to Regional Emerging Special Pathogen Treatment Center in Omaha and “remain asymptomatic,” per the U.S. Department of Health & Human Services.

“Passengers and crew are being followed up in their countries, where WHO recommends a 42-day quarantine at home or in a facility starting from day of departure from the ship,” WHO said via X on Tuesday.