Rare Andes Hantavirus Strain Detected in Cruise Ship Outbreak

May 6, 2026

87 min

May 6, 2026 15:30

WHO: Contact tracing underway as rare 'Andes' Hantavirus strain confirmed in cruise ship outbreak

## Outbreak Details

The World Health Organization (WHO) has confirmed the presence of the rare Andes strain of hantavirus on the cruise ship MV Hondius. This strain, known for its potential to spread between humans, was identified among passengers during a recent outbreak.

## Health Response

WHO, along with international laboratories, is actively responding to the situation. Measures include contact tracing, genetic sequencing, and monitoring of affected individuals. The outbreak has resulted in three deaths and several illnesses, with one patient in critical condition.

## Transmission and Risk

The Andes hantavirus, primarily found in South America, is unique among hantaviruses for its ability to occasionally transmit from person to person. However, experts emphasize that such transmission is rare and requires close contact. The overall risk to the global population remains low, according to WHO.

## Current Investigations

Health officials in South Africa confirmed the strain through laboratory tests on two passengers, one of whom has died. Genetic analyses are ongoing to map the transmission chain, with samples being sent to specialized labs, including the Institut Pasteur in Senegal.

## Symptoms and Treatment

Symptoms of the Andes strain include flu-like illness that can progress to severe respiratory failure. There is no specific antiviral treatment, and care focuses on managing symptoms. Early detection is crucial for better outcomes.

## Ongoing Monitoring

Contact tracing is critical due to the virus's incubation period of up to eight weeks. WHO stresses the importance of monitoring individuals who had close contact with confirmed cases during the voyage.

## International Cooperation

Spain has agreed to receive the MV Hondius in the Canary Islands for medical evaluation and treatment of passengers and crew. This decision aligns with international law and humanitarian principles, as stated by WHO.

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