Hantavirus outbreak on cruise ship prompts urgent health alert for South African flight passengers

Health Department urges calm after rare Hantavirus case confirmed in South AfricaHealth Department urges calm after rare Hantavirus case confirmed in South Africa Health Department urges calm after rare Hantavirus case confirmed in South Africa A hantavirus outbreak aboard a cruise ship has sparked an urgent contact tracing operation for passengers of a recent commercial flight to South Africa. The outbreak triggered an international public health alert after one of the victims, an adult female, travelled on Airlink flight 4Z132 from St. Helena Island to Johannesburg on April 25, 2026.

According to a post by Polymarket, the World Health Organization (WHO) urges passengers who took Airlink flight 4Z132 from St. Helena to Johannesburg on April 25 to contact health authorities over hantavirus concerns. The passenger’s condition worsened during the flight and she died upon arrival at a Johannesburg emergency department on April 26.

It is believed she was in close contact with the first person to die from the virus on the ship. Subsequent PCR testing confirmed her hantavirus infection. WHO confirmed that out of the ship’s 147 passengers and crew, seven individuals have been identified with the virus, including two laboratory-confirmed cases and five suspected cases.

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The vessel, which is currently moored off the coast of Cabo Verde, originally departed from Ushuaia, Argentina, on April 1, 2026. It followed a remote South Atlantic itinerary, including stops in Antarctica, South Georgia, and St. Helena, before the cluster of severe respiratory illnesses was reported to the WHO on May 2.

Symptoms included fever, gastrointestinal issues, rapid progression to pneumonia, and acute respiratory distress syndrome. The WHO and Airlink are urgently advising the 82 passengers and 6 crew members who were on the flight to immediately contact South African health authorities. According to a statement, Airlink said they were unaware of the passenger’s illness during the flight and have handed over the flight manifest, which includes contact details and seating allocations, to the Department of Health to aid in contact tracing. The airline emphasised that its aircraft are equipped with hospital-grade High Efficiency Particulate (HEPA) filters designed to repeatedly scrub the cabin air clean.

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