Spain Disputes U.S. 'Positive' Hantavirus Test; Maryland Flags Two New Exposure Cases as Nebraska Quarantine Numbers Get Corrected

The U.S. Department of Health and Human Services initially announced 17 American citizens were repatriated to Omaha. That was wrong. According to a Monday press briefing in Omaha — reported by Ars Technica — the actual number is 18: 17 U.S. citizens plus one dual British/U.S. citizen. HHS put out an incorrect statement and quietly corrected it at the press conference.

When managing a potential outbreak of a virus that kills roughly one-third of its victims, precision matters.

Spain Says the 'Positive' Test Isn't Conclusive

Spain and the U.S. are in an open disagreement over the American who tested "mildly positive."

According to Breitbart, Spanish health officials told reporters that the test was performed by an epidemiologist from the European Center for Disease Prevention and Control before the passenger boarded a flight home. The sample went to two labs. One came back negative. The other was ambiguous.

"The result was considered by the U.S. authorities as a weak positive, although for us it was not conclusive," Spain's Health Ministry said.

The WHO is currently logging this American case as "inconclusive" and has NOT updated its official case count to include it, according to Ars Technica.

So the U.S. is treating it as a positive. Spain and the WHO are not. Major news outlets treated this as settled fact in their headlines.

Where Everyone Is Right Now

As of Monday, according to the New York Times and NPR:

• 16 passengers are in Omaha at the University of Nebraska Medical Center's National Quarantine Unit — the only federally funded quarantine facility in the country
• 1 of those 16 — the person with the disputed positive test — is in the more restrictive Nebraska Biocontainment Unit
• 2 passengers — a couple, one of whom had mild symptoms — were sent to a hospital in Atlanta
• The couple's third member reportedly had a mild cough on May 6 that resolved within a day; infection is listed as "possible" but NOT "probable"

Passenger ages range from late 20s to early 80s, per HHS.

Three New York State residents are in the monitoring group, including one from New York City, according to New York Governor Kathy Hochul, who also activated the state lab for testing capacity.

Maryland: Two New People in the Picture

Fox News flagged a development that went largely uncovered: two Maryland residents are now being monitored for potential hantavirus exposure after sharing a commercial flight with a passenger linked to the cruise ship outbreak.

This raises the contact tracing problem from a contained ship to an airport and commercial aviation environment. Officials haven't said which flight, which airline, or what dates. That's information the public has a right to know.

Why Nebraska? The $21 Million Reason

NPR reported on why these passengers ended up in Omaha — not New York, not D.C., not Atlanta. Nebraska is home to the National Quarantine Unit, completed in late 2019 at a cost of nearly $20 million, and the Nebraska Biocontainment Unit, a five-room facility dedicated in 2005 that cost $1 million.

Both are at the University of Nebraska Medical Center. The biocontainment unit treated two Ebola-infected doctors in 2014. These are world-class facilities.

"We are prepared for situations exactly like this," said Dr. Michael Ash, CEO of Nebraska Medicine.

There is exactly one of these facilities in the entire country.

What the Officials Are Saying — And What They're Not

Admiral Brian Christine, HHS Assistant Secretary for Health, said Monday that "the risk of hantavirus to the general public remains very, very low."

RFK Jr., pressed by a reporter at a separate Oval Office event about mental health policy, said the U.S. has it "under control" and "we're not worried" about spread. The Hill covered the exchange.

President Trump separately said the U.S. is "in very good shape" on hantavirus.

Conservative commentators note that the same officials saying "don't worry" are the ones who initially got the passenger count wrong and are publicly at odds with Spain over what constitutes a confirmed case. Senator Chuck Schumer used the moment to attack Trump administration CDC budget cuts — which Fox News covered but NPR and the Times gave less attention. That political angle cuts both ways: the cuts are real, and their potential impact on outbreak response is a legitimate question.

What the Virus Actually Is

Fast facts: The strain on the MV Hondius is the Andes virus — the only hantavirus strain known to transmit human-to-human. Most hantaviruses spread through rodent droppings, not person-to-person. The Andes strain is the exception.

It kills about one-third of infected people, typically through respiratory failure. Incubation period: up to 42 days. There is no approved treatment. There is no widely available vaccine.

Three passengers are already dead — a Dutch couple and a German woman, according to Ars Technica.

Where This Stands

This is a contained situation — for now. The facilities handling it are genuinely excellent. But the U.S. government got the passenger count wrong, is publicly contradicting Spain and the WHO on a key diagnosis, and two new potential exposure cases just surfaced in Maryland through regular air travel.

Officials say the situation is "under control." Whether it stays that way depends on contact tracing working perfectly for a virus with a 42-day window and passengers who were already scattered across commercial airports before anyone knew they were exposed.

The Maryland cases will be key to watch.