Three people have died following an outbreak of a dangerous respiratory virus aboard a cruise ship in the Atlantic Ocean, according to the World Health Organization.

Health officials say at least six individuals have been infected with Hantavirus, including one laboratory-confirmed case and five suspected infections. Of those affected, three have died, while another patient is currently receiving intensive care treatment in South Africa.

Authorities have not released the name of the cruise ship or further identifying details.

“Detailed investigations are ongoing, including further laboratory testing and epidemiological investigations,” the WHO said in a statement. “Medical care and support are being provided to passengers and crew.”

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The agency also confirmed it is coordinating efforts between member states and the ship’s operators to evacuate passengers showing symptoms, while continuing to assess the public health risk for those still onboard.

What is Hantavirus?

Hantaviruses are a group of viruses typically spread through contact with urine, saliva, or droppings from infected rodents such as rats or mice.

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Infections are rare but can be extremely serious. In some cases, the virus can lead to hantavirus pulmonary syndrome, a severe respiratory condition.

Early symptoms often include fatigue, fever, and muscle aches. As the illness progresses, patients may experience headaches, dizziness, chills, nausea, and abdominal pain.

In more severe cases, the disease can rapidly escalate, causing coughing, shortness of breath, and fluid buildup in the lungs — making it difficult to breathe.

According to the Centers for Disease Control and Prevention, more than one-third of patients who develop respiratory symptoms may not survive.

Ongoing Response

The WHO says virus sequencing and further testing are currently underway to better understand the outbreak.

Health authorities are continuing to monitor the situation closely, as concerns grow over how the infection spread onboard and whether additional cases may emerge.