WHO Confirms Andes Strain Behind the Hantavirus Outbreak Onboard the MV Hondius Cruise Ship. New Sublineage Possibly Involved
Nikhil Prasad Fact checked by:Thailand Medical News Team May 07, 2026 52 minutes ago
Medical News: The World Health Organization has now officially confirmed that the deadly hantavirus outbreak linked to the expedition cruise vessel MV Hondius involves the notorious Andes strain, the only known hantavirus variant capable of human-to-human transmission. The outbreak, which has already caused multiple deaths and several confirmed infections among passengers and crew, has triggered a multinational public health investigation spanning Europe, South America, and Africa.
WHO investigators race to determine if a newly emerging Andes hantavirus sublineage fueled the deadly MV Hondius
cruise ship outbreak.
Health officials say the outbreak likely began after exposure in Argentina before the ship departed Ushuaia in early April. However, epidemiologists are increasingly concerned that onboard transmission subsequently occurred among cabin mates and close contacts in the confined cruise environment. The MV Hondius was carrying nearly 150 individuals from over 20 countries when the outbreak emerged.
Andes Virus Raises Unique Global Concerns
Unlike most hantaviruses that spread mainly through inhalation of aerosolized rodent urine, saliva, or droppings, the Andes strain has repeatedly demonstrated the rare ability for person-to-person transmission. Previous outbreaks in Argentina and Chile showed that close physical proximity, respiratory droplets, and prolonged contact can facilitate spread between humans.
Medical experts monitoring the MV Hondius outbreak warn that the confined nature of cruise ships creates ideal conditions for secondary transmission chains. Several infected individuals reportedly shared cabins or spent extended periods in close quarters before symptoms appeared. WHO officials have stated that the current event remains under investigation, but human-to-human spread “cannot be ruled out.”
Scientists Investigating Possible New Andes Sublineage
What has alarmed virologists even further is the discovery of additional genetic mutations in samples obtained from infected patients. Preliminary genomic analyses suggest the virus involved may not fully match previously cataloged Andes virus sequences circulating in South America.
Researchers from several international laboratories are now conducting full genomic sequencing to determine whether a new sublineage of the Andes strain is emerging. Early findings reportedly indicate mutations involving viral surface glycoproteins and replication-associated regions that may potentially enhance viral adaptation in humans.
This
Medical News report notes that investigators are especially focused on whether the detected mutations could partly explain the apparent efficiency of transmission observed onboard the ship. Scientists caution that it remains too early to determine whether these genomic changes significantly alter transmissibility or virulence.
Global Monitoring Intensifies
Confirmed and suspe
cted cases linked to the ship have now appeared in multiple countries including South Africa, Switzerland, the Netherlands, Germany, and Spain. Additional passengers who disembarked earlier are being traced while onboard isolation measures remain active.
Experts emphasize that the public risk remains relatively low at present, but the outbreak represents one of the most unusual hantavirus clusters ever documented outside South America. The combination of possible human adaptation, maritime spread, and newly detected mutations has placed global infectious disease agencies on heightened alert while sequencing studies continue.
Reference:
https://x.com/WHO/status/2051952287245897925
https://ukhsa.blog.gov.uk/2026/05/05/what-is-hantavirus-how-is-it-transmitted-and-what-are-the-symptoms/
https://www.ecdc.europa.eu/en/news-events/cruise-ship-hantavirus-outbreak-ecdc-response-activated
Please note that this is a developing story and we have our known network of reliable and credible sources and once we have more details from relevant officials and agencies with published official data, we will provide more additional details and links. Details of the mutations and the identified sub-lineages will be provided once they are officially released. Lower life forms on various social media platforms like X (formerly twitter) with stupid or obnoxious comments will not only be blocked but we will find ways to proceed with legal actions or even other alternative measures to deal with such garbage!
For the latest on the hantavirus outbreak onboard the MV Hondius cruise ship, keep on logging to Thailand
Medical News.
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