WHO flags hantavirus outbreak linked to cruise travel, with SA case confirmed

The World Health Organization has issued an alert following a cluster of hantavirus infections linked to cruise ship travel, including a confirmed case in South Africa.

The outbreak, detailed in the WHO’s latest Disease Outbreak News (DON599), involves passengers who developed severe respiratory illness after travelling on a cruise ship.

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Cases, deaths and South Africa link

According to the WHO, seven cases have been identified so far, including two laboratory-confirmed infections and five suspected cases.

Three deaths have been reported, with one patient in critical condition.

A key development is that laboratory testing in South Africa confirmed hantavirus infection in one critically ill patient, placing the country directly within the global health update.

Symptoms among affected individuals included:

• Fever
• Gastrointestinal illness
• Rapid progression to pneumonia
• Acute respiratory distress

The onset of illness ranged from early to late April 2026.

What is hantavirus and how does it spread?

Hantavirus is a rare but serious disease primarily spread through contact with infected rodents, including exposure to their urine, droppings or saliva.

In rare cases, limited human-to-human transmission has been recorded, particularly with certain strains such as the Andes virus.

The illness can escalate quickly, leading to severe respiratory complications and, in some cases, death.

How the outbreak is being managed

The WHO says the situation is being handled through a coordinated international response.

Measures include:

• Isolation and treatment of cases
• Medical evacuations
• Laboratory investigations
• Ongoing monitoring of contacts

Authorities are continuing to investigate how the infections occurred and whether further spread is possible.

Risk level remains low

Despite the severity of individual cases, the WHO has assessed the overall risk to the global population as low.

The organisation will continue to monitor the situation and provide updates as more information becomes available.

Why this matters

This outbreak highlights how quickly infectious diseases can move across borders through travel.

While the risk remains low, the presence of a confirmed case in South Africa brings the story closer to home and reinforces the importance of early detection and global coordination.

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