Hantavirus and What We Know About It

Last updated: May 6, 2026

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The quick answer

Hantavirus is not new, but the current cruise ship cluster has drawn attention because investigators have confirmed the Andes strain, a hantavirus type known to be capable of rare person-to-person spread after close contact. Most hantavirus infections still come from exposure to infected rodents, especially their urine, droppings, saliva, or contaminated nesting materials. Public-health officials continue to describe the wider public risk as low, while they investigate cases, trace contacts, isolate people at risk, and arrange medical care.

WHO’s early assessment stated that “human hantavirus infection is primarily acquired through contact with the urine, faeces, or saliva of infected rodents,” while noting that limited human-to-human transmission has previously been reported with Andes virus.

1. What is Hantavirus?

Hantaviruses are a family of viruses that can cause severe illness, including hantavirus pulmonary syndrome, which affects the lungs, and hemorrhagic fever with renal syndrome, which affects the kidneys. In the United States and much of the Americas, hantavirus pulmonary syndrome is the form that receives the most attention because it can progress quickly from flu-like symptoms to cough, shortness of breath, fluid in the lungs, and life-threatening respiratory distress.

2. Current cases: what has been reported so far?

As of WHO’s May 4 update, officials had identified seven cruise-linked cases, including two laboratory-confirmed cases and five suspected cases, with three deaths, one critically ill patient, and three people with mild symptoms. By May 6, reporting from the Associated Press via CBC said WHO had confirmed five cases and was investigating three suspected cases, after a former passenger in Switzerland tested positive.

The case count may keep changing because testing, sequencing, and follow-up investigations are still underway. That matters because some people may have left the ship before the outbreak was fully recognized, and others may still be within the incubation window.

Current Cases Reported

3. Contact tracing status: what are officials doing?

Contact tracing is underway across multiple jurisdictions. WHO reported that contact tracing had begun for passengers on a flight from Saint Helena to Johannesburg taken by a confirmed case who later died. South African health officials later identified 62 contacts, including flight crew and healthcare workers, and had completed contact tracing for 42 of them at the time of CBC/AP reporting.

This is important because the Andes strain can rarely spread between people after close exposure. Still, public-health agencies are not describing this as a broad community-spread event. Instead, they are focusing on defined contacts, such as close contacts, healthcare workers, flight contacts, and people who disembarked before the ship reached its current response plan.

4. Cruise ship status: are people being held onboard?

The ship at the center of the cluster is the MV Hondius, a Dutch-flagged expedition cruise vessel that departed Ushuaia, Argentina, on April 1 and traveled through remote South Atlantic locations. On May 4, WHO reported that the vessel was moored off Cabo Verde and that passengers had been advised to practice maximal physical distancing and remain in cabins where possible.

By May 5, Al Jazeera and Reuters reported that the ship was being held in the Atlantic near Cape Verde and that passengers were not being allowed off while authorities investigated. By May 6, three people had been medically evacuated, the vessel had left Cape Verde, and it was heading toward Spain’s Canary Islands with nearly 150 people still onboard. CBC/AP reported that remaining passengers were asymptomatic and that Spain planned to repatriate non-Spanish citizens after arrival in Tenerife, while Spanish passengers would be transferred to a Madrid hospital for quarantine.

5. Why hygiene products matter right now

The products below should not be viewed as a cure, guaranteed protection, or substitute for public-health instructions. They are practical preparedness items that align with the core prevention themes emphasized by WHO and CDC: avoid rodent exposure, clean contaminated surfaces safely, practice hand hygiene, isolate when symptomatic, and reduce respiratory exposure during close-contact situations.

5.1 A cup dust mask or respirator for dusty cleanup and respiratory etiquette

If hantavirus exposure is suspected in a space with rodent droppings or nesting material, the main danger is stirring contaminated particles into the air. A mask can be useful only when it is appropriate for the task. For rodent cleanup, shoppers should look for a properly fitted, certified respirator, such as a NIOSH-approved N95 or better. A basic nuisance dust mask may help with ordinary dust but should not be treated as medical-grade protection or a substitute for official guidance.

Recommended product link:

Shop KN95 Mask

5.2 Bleach spray or EPA-registered disinfectant for surfaces

CDC guidance emphasizes that rodent urine and droppings should be sprayed with bleach solution or an EPA-registered disinfectant until very wet before cleanup, because dry sweeping or vacuuming can aerosolize contaminated material. A ready-to-use bleach spray can help households and workplaces avoid unsafe dry cleanup practices, especially in cabins, garages, sheds, storage spaces, vehicles, or other areas where rodents may have been present.

Recommended product link:

Clorox Healthcare Bleach Spray

5.3 Hand sanitizer for moments when soap and water are not available

WHO’s advice for the cruise ship event includes frequent hand hygiene, and CDC prevention guidance emphasizes avoiding contact with rodent-contaminated materials and cleaning up safely. Alcohol-based sanitizer is not a replacement for washing visibly dirty hands, but it is useful when people are traveling, waiting during screening, caring for others, or moving between spaces where soap and water are not immediately available.

Recommended product link:

Hand Sanitizer

5.4 Soap and moisturizer to support frequent handwashing

Frequent handwashing works best when people can keep doing it consistently. Soap removes dirt, organic material, and many germs from the skin, while moisturizer can reduce dryness and cracking that sometimes follows repeated washing. In a prolonged monitoring or quarantine situation, skin care becomes practical infection-prevention support because irritated skin can make people wash less often or less thoroughly.

Recommended product link:

Recommended Hand Soap

6. What to do if human-to-human spread remains a concern

If investigators continue to see evidence of person-to-person spread, the most important steps will still be directed by health authorities: isolate symptomatic people, trace close contacts, monitor symptoms through the incubation period, use respiratory precautions in healthcare settings, and maintain careful environmental cleaning. Individuals can support those measures by practicing hand hygiene, following quarantine or monitoring instructions, avoiding close contact with symptomatic people, and seeking care quickly if fever, gastrointestinal symptoms, cough, shortness of breath, or sudden respiratory illness develops after possible exposure.

The practical takeaway is simple: do not panic, but do prepare. Hantavirus remains rare, and officials continue to describe the broader risk as low. The reason to keep masks, disinfectant, sanitizer, and soap available is not because these products can “stop” hantavirus on their own. It is because they support the layered prevention strategy public-health officials already recommend: reduce exposure, clean safely, keep hands clean, and limit close-contact spread if the Andes strain is involved.