What is hantavirus and how does it spread?

A cruise ship, the MV Hondius, has been linked to multiple cases of hantavirus, including three confirmed infections and five suspected cases. The confirmed cases involve a Dutch woman who died, a British passenger in intensive care in South Africa, and a Swiss passenger receiving treatment in Zurich. The suspected cases include a British man, a Dutch crew member, and a German national, with some already receiving treatment in the Netherlands or awaiting evacuation. The ship was traveling from Argentina across the Atlantic to Cape Verde when the infections were identified. Authorities are closely monitoring passengers who have disembarked in various countries, including the United States, where three individuals are under observation but show no symptoms. Passengers are being medically assessed and allowed to leave the ship in phases based on nationality, with some Spanish and French passengers already repatriated. The UK and other nations have arranged charter flights for their citizens, while two British passengers remain in home isolation after potential exposure. The virus strain involved is the Andes virus, a rare hantavirus variant known for its potential human-to-human transmission, unlike most hantaviruses which primarily spread through contact with rodent excreta. The Andes virus is endemic to Argentina and Chile and was responsible for a significant outbreak in Argentina in 2018, where close contact at a social event led to 34 confirmed cases and 11 deaths. South Africa’s health minister confirmed the presence of the Andes virus in two of the cruise ship’s infected passengers. The confirmation of the Andes virus on the MV Hondius underscores the need for stringent infection control measures, including social distancing and hygiene protocols similar to those used during the COVID-19 pandemic. The World Health Organization has emphasized the importance of these precautions to prevent further spread among passengers and crew, given the virus’s rare but possible human-to-human transmission. The situation remains under close international health surveillance as authorities continue to manage the outbreak and assess risks.