The Numbers as of May 13, 2026

As of May 13, WHO's official Disease Outbreak News report counts 11 confirmed or probable cases tied to the MV Hondius cruise ship, with three deaths — a case fatality ratio of 27%. More than one in four people who contracted this virus on that ship died.

WHO Director-General Tedros Adhanom Ghebreyesus told reporters on Sunday that the count had reached 12 cases and that the situation is "stable for now," according to The Hill. The one-case gap between Tedros's public statement and the May 13 WHO Disease Outbreak News reflects the speed at which this outbreak is still moving.

Two New Country Cases, Plus One Unresolved in the U.S.

Since WHO's previous May 8 update, two new confirmed cases have been added — one from France, who became symptomatic during repatriation, and one from Spain, who tested positive upon arrival but is currently asymptomatic, according to the WHO Disease Outbreak News published May 13.

The bigger story is the United States case. A passenger repatriated to the U.S. was tested because of high-risk exposure to confirmed cases on board. One lab came back positive. A second lab came back negative. WHO is calling the result "inconclusive" and the individual is being retested. That person is currently asymptomatic.

A person on U.S. soil has a split lab result for Andes virus — the hantavirus strain with documented human-to-human transmission capability — and the final determination is still pending.

What This Virus Actually Does

Andes virus (ANDV) causes Hantavirus Cardiopulmonary Syndrome (HCPS) — a rapidly progressive condition attacking the lungs and heart. WHO's own fact sheet puts the case fatality rate for hantaviruses in the Americas at up to 50%. The MV Hondius outbreak is tracking at 27%.

Andes virus is the only known hantavirus with documented human-to-human transmission, primarily seen in Argentina and Chile. Most hantaviruses require direct contact with infected rodents or their urine, droppings, or saliva. ANDV breaks that rule. WHO has published specific interim guidance for managing contacts of ANDV cases from this cruise ship.

There is no cure. No specific antiviral treatment. Supportive care only, according to WHO's fact sheet updated May 2026.

The Working Hypothesis Investigators Still Can't Fully Confirm

WHO says the working hypothesis is that the first case was infected before boarding — through land exposure — and then transmitted the virus to other passengers on the ship. Investigations are ongoing.

The ship is Dutch-flagged. The first notification came from the United Kingdom to WHO on May 2, 2026. Cases have since been confirmed across multiple countries. International contact tracing is active through IHR channels.

What Mainstream Coverage Is Missing

Most headlines are running with Tedros's "stable" quote and stopping there. "Stable" means the case count isn't exploding exponentially — it does NOT mean resolved, contained, or safe. An American with a split-result hantavirus test is waiting on a retest right now.

The 27% fatality rate is also not getting the attention it deserves. Coverage keeps anchoring on the raw case count — 11, now 12 — making this sound smaller than it is.

WHO has also published a new Outbreak Toolbox specifically for this MV Hondius cluster, including technical notes for disembarkation management and interim guidance for contact tracing ANDV cases.

The WHO Risk Assessment

WHO's official risk assessment: low risk to the global population. This is NOT a pandemic in the making based on current data.

But low global risk is different from zero risk for people directly exposed. And it's different from "case closed" on the U.S. inconclusive result.

What This Means for Regular People

If you were on the MV Hondius, you should already know — international contact tracing has been active since early May. If you weren't, the current global risk is assessed as low by WHO.

The U.S. retest result remains critical. If it comes back positive, this outbreak has its first confirmed American case — and the U.S. response protocols get a real-world test. If it comes back negative, one more close call documented.